10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

ý Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

For the quarterly period ended March 31, 2015

¨ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

For the transition period from to

Commission file number 001-34657

TEXAS CAPITAL BANCSHARES, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	75-2679109
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

2000 McKinney Avenue, Suite 700, Dallas, Texas, U.S.A.	75201
(Address of principal executive officers)	(Zip Code)

214/932-6600

(Registrant’s telephone number,

including area code)

N/A

(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer. See definition of “large accelerated filer” and “accelerated filer” Rule 12b-2 of the Exchange Act.

Large Accelerated Filer	ý	Accelerated Filer	¨
Non-Accelerated Filer	¨	Smaller Reporting Company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes ¨    No ý

APPLICABLE ONLY TO CORPORATE ISSUERS:

On April 21, 2015, the number of shares set forth below was outstanding with respect to each of the issuer’s classes of common stock:

Common Stock, par value $0.01 per share 45,774,646

Texas Capital Bancshares, Inc.

Form 10-Q

Quarter Ended March 31, 2015

Index

Part I. Financial Information
Item 1.	Financial Statements
	Consolidated Balance Sheets—Unaudited	3
	Consolidated Statements of Income and Other Comprehensive Income—Unaudited	4
	Consolidated Statements of Stockholders’ Equity—Unaudited	5
	Consolidated Statements of Cash Flows—Unaudited	6
	Notes to Consolidated Financial Statements—Unaudited	7
	Financial Summaries—Unaudited	27
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	40
Item 4.	Controls and Procedures	43
Part II. Other Information
Item 1.	Legal Proceedings	43
Item 1A.	Risk Factors	43
Item 6.	Exhibits	44
Signatures		45

2

PART I – FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

TEXAS CAPITAL BANCSHARES, INC.

CONSOLIDATED BALANCE SHEETS - UNAUDITED

(In thousands except share data)

	March 31, 2015			December 31, 2014
Assets
Cash and due from banks	$	99,602		$	96,524
Interest-bearing deposits	734,945			1,233,990
Securities, available-for-sale	37,649			41,719
Loans held for investment, mortgage finance	5,408,750			4,102,125
Loans held for investment (net of unearned income)	10,760,978			10,154,887
Less: Allowance for loan losses	108,078			100,954
Loans held for investment, net	16,061,650			14,156,058
Premises and equipment, net	16,037			17,368
Accrued interest receivable and other assets	355,163			333,699
Goodwill and intangible assets, net	20,412			20,588
Total assets	$	17,325,458		$	15,899,946
Liabilities and Stockholders’ Equity
Liabilities:
Deposits:
Non-interest-bearing	$	6,050,817		$	5,011,619
Interest-bearing	7,816,310			7,348,972
Interest-bearing in foreign branches	255,179			312,709
Total deposits	14,122,306			12,673,300
Accrued interest payable	2,545			4,747
Other liabilities	157,785			145,622
Federal funds purchased and repurchase agreements	125,458			92,676
Other borrowings	1,000,000			1,100,005
Subordinated notes	286,000			286,000
Trust preferred subordinated debentures	113,406			113,406
Total liabilities	15,807,500			14,415,756
Stockholders’ equity:
Preferred stock, $.01 par value, $1,000 liquidation value:
Authorized shares – 10,000,000
Issued shares – 6,000,000 shares issued at March 31, 2015 and December 31, 2014, respectively	150,000			150,000
Common stock, $.01 par value:
Authorized shares – 100,000,000
Issued shares – 45,772,662 and 45,735,424 at March 31, 2015 and December 31, 2014, respectively	457			457
Additional paid-in capital	710,943			709,738
Retained earnings	655,326			622,714
Treasury stock (shares at cost: 417 at March 31, 2015 and December 31, 2014)	(8		)	(8		)
Accumulated other comprehensive income, net of taxes	1,240			1,289
Total stockholders’ equity	1,517,958			1,484,190
Total liabilities and stockholders’ equity	$	17,325,458		$	15,899,946

See accompanying notes to consolidated financial statements.

3

TEXAS CAPITAL BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME – UNAUDITED

(In thousands except per share data)

	Three months ended March 31,
	2015			2014
Interest income
Interest and fees on loans	$	139,174		$	115,872
Securities	358			540
Federal funds sold	116			40
Deposits in other banks	1,260			159
Total interest income	140,908			116,611
Interest expense
Deposits	5,628			4,030
Federal funds purchased	68			95
Repurchase agreements	4			4
Other borrowings	390			72
Subordinated notes	4,191			3,479
Trust preferred subordinated debentures	618			616
Total interest expense	10,899			8,296
Net interest income	130,009			108,315
Provision for credit losses	11,000			5,000
Net interest income after provision for credit losses	119,009			103,315
Non-interest income
Service charges on deposit accounts	2,094			1,696
Trust fee income	1,200			1,282
Bank owned life insurance (BOLI) income	484			509
Brokered loan fees	4,232			2,824
Swap fees	1,986			1,224
Other	2,271			2,821
Total non-interest income	12,267			10,356
Non-interest expense
Salaries and employee benefits	45,828			42,056
Net occupancy expense	5,691			4,768
Marketing	4,218			3,759
Legal and professional	4,048			5,402
Communications and technology	5,078			3,924
FDIC insurance assessment	3,790			2,725
Allowance and other carrying costs for OREO	9			45
Other	7,855			6,638
Total non-interest expense	76,517			69,317
Income before income taxes	54,759			44,354
Income tax expense	19,709			16,089
Net income	35,050			28,265
Preferred stock dividends	2,438			2,438
Net income available to common stockholders	$	32,612		$	25,827
Other comprehensive income (loss)
Change in net unrealized gain on available-for-sale securities arising during period, before-tax	$	(76	)	$	(162	)
Income tax benefit related to net unrealized gain on available-for-sale securities	(27		)	(57		)
Other comprehensive loss, net of tax	(49		)	(105		)
Comprehensive income	$	35,001		$	28,160
Basic earnings per common share	$	0.71		$	0.61
Diluted earnings per common share	$	0.70		$	0.60

See accompanying notes to consolidated financial statements.

4

TEXAS CAPITAL BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - UNAUDITED

(In thousands except share data)

	Preferred Stock			Common Stock									Treasury Stock
	Shares	Amount		Shares	Amount		Additional Paid-in Capital			Retained Earnings			Shares		Amount			Accumulated Other Comprehensive Income (Loss), Net of Taxes			Total
Balance at December 31, 2013	6,000,000	$	150,000	41,036,787	$	410	$	448,208		$	496,112		(417	)	$	(8	)	$	1,628		$	1,096,350
Comprehensive income:
Net income	—	—		—	—		—			28,265			—		—			—			28,265
Change in unrealized gain on available-for-sale securities, net of taxes of $57	—	—		—	—		—			—			—		—			(105		)	(105		)
Total comprehensive income																					28,160
Tax benefit related to exercise of stock-based awards	—	—		—	—		955			—			—		—			—			955
Stock-based compensation expense recognized in earnings	—	—		—	—		1,262			—			—		—			—			1,262
Issuance of preferred stock	—	—		—	—		—			—			—		—			—			—
Preferred stock dividend	—	—		—	—		—			(2,438		)	—		—			—			(2,438		)
Issuance of stock related to stock-based awards	—	—		46,660	1		(707		)	—			—		—			—			(706		)
Issuance of common stock	—	—		1,875,000	19		106,529			—			—		—			—			106,548
Issuance of common stock related to warrants	—	—		773	—		—			—			—		—			—			—
Balance at March 31, 2014	6,000,000	$	150,000	42,959,220	$	430	$	556,247		$	521,939		(417	)	$	(8	)	$	1,523		$	1,230,131
Balance at December 31, 2014	6,000,000	$	150,000	45,735,424	$	457	$	709,738		$	622,714		(417	)	$	(8	)	$	1,289		$	1,484,190
Comprehensive income:
Net income	—	—		—	—		—			35,050			—		—			—			35,050
Change in unrealized gain on available-for-sale securities, net of taxes of $27	—	—		—	—		—			—			—		—			(49		)	(49		)
Total comprehensive income																					35,001
Tax benefit related to exercise of stock-based awards	—	—		—	—		263			—			—		—			—			263
Stock-based compensation expense recognized in earnings	—	—		—	—		991			—			—		—			—			991
Preferred stock dividend	—	—		—	—		—			(2,438		)	—		—			—			(2,438		)
Issuance of stock related to stock-based awards	—	—		37,238	—		(49		)	—			—		—			—			(49		)
Balance at March 31, 2015	6,000,000	$	150,000	45,772,662	$	457	$	710,943		$	655,326		(417	)	$	(8	)	$	1,240		$	1,517,958

See accompanying notes to consolidated financial statements.

5

TEXAS CAPITAL BANCSHARES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS—UNAUDITED

(In thousands)

	Three months ended March 31,
	2015			2014
Operating activities
Net income from continuing operations	$	35,050		$	28,265
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	11,000			5,000
Depreciation and amortization	4,060			3,012
Amortization and accretion on securities	—			1
Bank owned life insurance (BOLI) income	(484		)	(509		)
Stock-based compensation expense	2,357			4,655
Excess tax expense from stock-based compensation arrangements	(305		)	(955		)
Gain on sale of assets	—			136
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(24,849		)	3,681
Accrued interest payable and other liabilities	8,885			(4,763		)
Net cash provided by operating activities	35,714			38,523
Investing activities
Maturities and calls of available-for-sale securities	1,950			7,440
Principal payments received on available-for-sale securities	2,044			2,651
Originations of mortgage finance loans	(21,276,920		)	(9,687,691		)
Proceeds from pay-offs of mortgage finance loans	19,970,295			9,783,912
Net increase in loans held for investment, excluding mortgage finance loans	(609,967		)	(444,070		)
Purchase (disposal) of premises and equipment, net	251			(1,161		)
Proceeds from sale of foreclosed assets	1,065			3,405
Net cash used in investing activities	(1,911,282		)	(335,514		)
Financing activities
Net increase in deposits	1,449,006			471,749
Net expense from issuance of stock related to stock-based awards	(49		)	(706		)
Net proceeds from issuance of common stock	—			106,548
Preferred dividends paid	(2,438		)	(2,438		)
Net increase in other borrowings	(100,005		)	(342,527		)
Excess tax benefits from stock-based compensation arrangements	305			955
Net increase (decrease) in Federal funds purchased and repurchase agreements	32,782			(5,077		)
Net proceeds from issuance of subordinated notes	—			172,375
Net cash provided by financing activities	1,379,601			400,879
Net increase (decrease) in cash and cash equivalents	(495,967		)	103,888
Cash and cash equivalents at beginning of period	1,330,514			153,911
Cash and cash equivalents at end of period	$	834,547		$	257,799
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	$	13,101		$	6,741
Cash paid during the period for income taxes	891			882
Transfers from loans/leases to OREO and other repossessed assets	1,092			851

See accompanying notes to consolidated financial statements.

6

TEXAS CAPITAL BANCSHARES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—UNAUDITED

(1) OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization and Nature of Business

Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.

Basis of Presentation

Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.

The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2014, included in our Annual Report on Form 10-K filed with the SEC on February 19, 2015 (the “2014 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.

7

(2) EARNINGS PER COMMON SHARE

The following table presents the computation of basic and diluted earnings per share (in thousands except per share data):

	Three months ended   March 31,
	2015		2014
Numerator:
Net income	$	35,050	$	28,265
Preferred stock dividends	2,438		2,438
Net income available to common stockholders	$	32,612	25,827
Denominator:
Denominator for basic earnings per share— weighted average shares	45,758,655		42,298,355
Effect of employee stock-based awards(1)	210,736		381,597
Effect of warrants to purchase common stock	398,479		540,009
Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions	46,367,870		43,219,961
Basic earnings per common share	$	0.71	$	0.61
Diluted earnings per common share	$	0.70	$	0.60

(1) Stock options, SARs and RSUs outstanding of 168,300 at March 31, 2015 and 23,000 at March 31, 2014 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

(3) SECURITIES

Securities are identified as either held-to-maturity or available-for-sale based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. Held-to-maturity securities are carried at cost, adjusted for amortization of premiums or accretion of discounts. Available-for-sale securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Securities identified as available-for-sale are carried at fair value. Unrealized gains or losses on available-for-sale securities are recorded as accumulated other comprehensive income in stockholders’ equity, net of taxes. Amortization of premiums or accretion of discounts on mortgage-backed securities is periodically adjusted for estimated prepayments. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.

At March 31, 2015, our net unrealized gain on the available-for-sale securities portfolio was $1.9 million compared to $2.0 million at December 31, 2014. As a percent of outstanding balances, the unrealized gain was 5.34% and 4.99% at March 31, 2015, and December 31, 2014, respectively. The increase in the unrealized gain percentage at March 31, 2015 is related to the increase in market prices offset by the reduction in the portfolio balance.

8

The following is a summary of securities (in thousands):

	March 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	26,912	$	2,006	$	—		$	28,918
Municipals	1,308		5		—			1,313
Equity securities(1)	7,522		26		(130		)	7,418
	$	35,742	$	2,037	$	(130	)	$	37,649
	December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	28,957	$	2,108	$	—		$	31,065
Municipals	3,257		10		—			3,267
Equity securities(1)	7,522		16		(151		)	7,387
	$	39,736	$	2,134	$	(151	)	$	41,719

(1) Equity securities consist of Community Reinvestment Act funds.

The amortized cost and estimated fair value of securities are presented below by contractual maturity (in thousands, except percentage data):

	March 31, 2015
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	—		$	7,967		$	5,250		$	13,695		$	26,912
Estimated fair value	—			8,394			5,904			14,620			28,918
Weighted average yield(3)	—			4.79		%	5.54		%	2.36		%	3.73		%
Municipals:(2)
Amortized cost	745			563			—			—			1,308
Estimated fair value	747			566			—			—			1,313
Weighted average yield(3)	5.51		%	5.69		%	—			—			5.59		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,418			—			—			—			7,418
Total available-for-sale securities:
Amortized cost													$	35,742
Estimated fair value													$	37,649

9

	December 31, 2014
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	1		$	9,151		$	5,661		$	14,144		$	28,957
Estimated fair value	1			9,662			6,333			15,069			31,065
Weighted average yield(3)	6.50		%	4.79		%	5.54		%	2.36		%	3.75		%
Municipals:(2)
Amortized cost	1,669			1,588			—			—			3,257
Estimated fair value	1,674			1,593			—			—			3,267
Weighted average yield(3)	5.78		%	5.79		%	—			—			5.79		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,387			—			—			—			7,387
Total available-for-sale securities:
Amortized cost													$	39,736
Estimated fair value													$	41,719

(1) Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

(2) Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

(3) Yields are calculated based on amortized cost.

(4) These equity securities do not have a stated maturity.

Securities with carrying values of approximately $28.8 million were pledged to secure certain borrowings and deposits at March 31, 2015. Of the pledged securities at March 31, 2015, approximately $9.4 million were pledged for certain deposits, and approximately $19.4 million were pledged for repurchase agreements.

The following table discloses, as of March 31, 2015 and December 31, 2014, our investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months (in thousands):

March 31, 2015	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,370	$	(130	)	$	6,370	$	(130	)
December 31, 2014	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,349	$	(151	)	$	6,349	$	(151	)

At March 31, 2015, we owned one security with an unrealized loss position. This security is a publicly traded equity fund and is subject to market pricing volatility. We do not believe this unrealized loss is “other than temporary”. We have evaluated the near-term prospects of the investment in relation to the severity and duration of the impairment and based on that evaluation have the ability and intent to hold the investment until recovery of fair value.

Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income (loss), net. Comprehensive income for the three months ended March 31, 2015 and 2014 included net after-tax losses of $49,000 and $105,000, respectively, due to changes in the net unrealized gains/losses on securities available-for-sale.

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(4) LOANS AND ALLOWANCE FOR LOAN LOSSES

At March 31, 2015 and December 31, 2014, loans were as follows (in thousands):

	March 31, 2015			December 31, 2014
Commercial	$	6,188,958		$	5,869,219
Mortgage finance	5,408,750			4,102,125
Construction	1,559,545			1,416,405
Real estate	2,957,786			2,807,127
Consumer	17,868			19,699
Leases	93,051			99,495
Gross loans held for investment	16,225,958			14,314,070
Deferred income (net of direct origination costs)	(56,230		)	(57,058		)
Allowance for loan losses	(108,078		)	(100,954		)
Total	$	16,061,650		$	14,156,058

Commercial Loans and Leases. Our commercial loan and lease portfolio is comprised of lines of credit for working capital and term loans and leases to finance equipment and other business assets. Our energy production loans are generally collateralized with proven reserves based on appropriate valuation standards and take into account the risk of oil and gas price volatility. Our commercial loans and leases are underwritten after carefully evaluating and understanding the borrower’s ability to operate profitably. Our underwriting standards are designed to promote relationship banking rather than to make loans on a transactional basis. Our lines of credit typically are limited to a percentage of the value of the assets securing the line. Lines of credit and term loans typically are reviewed annually and are supported by accounts receivable, inventory, equipment and other assets of our clients’ businesses.

Mortgage Finance Loans. Our mortgage finance loans consist of ownership interests purchased in single-family residential mortgages funded through our mortgage finance group. These interests are typically on our balance sheet for 10 to 20 days. We have agreements with mortgage lenders and purchase interests in individual loans they originate. All loans are underwritten consistent with established programs for permanent financing with financially sound investors. Substantially all loans are conforming loans. Balances as of March 31, 2015 and December 31, 2014 are stated net of $429.8 million and $358.3 million participations sold, respectively.

Construction Loans. Our construction loan portfolio consists primarily of single- and multi-family residential properties and commercial projects used in manufacturing, warehousing, service or retail businesses. Our construction loans generally have terms of one to three years. We typically make construction loans to developers, builders and contractors that have an established record of successful project completion and loan repayment and have a substantial equity investment in the borrowers. Loan amounts are derived primarily from the bank's evaluation of expected cash flows available to service debt from stabilized projects under hypothetically stressed conditions. Construction loans are also based in part upon estimates of costs and value associated with the completed project. Sources of repayment for these types of loans may be pre-committed permanent loans from other lenders, sales of developed property or an interim loan commitment from us until permanent financing is obtained. The nature of these loans makes ultimate repayment sensitive to overall economic conditions. Borrowers may not be able to correct conditions of default in loans, increasing risk of exposure to classification, non-performing status, reserve allocation and actual credit loss and foreclosure. These loans typically have floating rates and commitment fees.

Real Estate Loans. A portion of our real estate loan portfolio is comprised of loans secured by properties other than market risk or investment-type real estate. Market risk loans are real estate loans where the primary source of repayment is expected to come from the sale, permanent financing or lease of the real property collateral. We generally provide temporary financing for commercial and residential property. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Our real estate loans generally have maximum terms of five to seven years, and we provide loans with both floating and fixed rates. We generally avoid long-term loans for commercial real estate held for investment. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Appraised values may be highly variable due to market conditions and the impact of the inability of potential purchasers and lessees to obtain financing and a lack of transactions at comparable values.

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At March 31, 2015 and December 31, 2014, we had a blanket floating lien on certain real estate-secured loans, mortgage finance loans and certain securities used as collateral for Federal Home Loan Bank (“FHLB”) borrowings.

Portfolio Geographic Concentration

As of March 31, 2015, a substantial majority of our loans held for investment, excluding our mortgage finance loans and other national lines of business, were to businesses with headquarters and operations in Texas. This geographic concentration subjects the loan portfolio to the general economic conditions within this area. Additionally, we may make loans to these businesses and individuals secured by assets located outside of Texas. The risks created by this concentration have been considered by management in the determination of the appropriateness of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover probable losses inherent in the loan portfolio at each balance sheet date.

Summary of Loan Loss Experience

The reserve for loan losses is comprised of specific reserves for impaired loans and an estimate of losses inherent in the portfolio at the balance sheet date, but not yet identified with specified loans. We regularly evaluate our reserve for loan losses to maintain an appropriate level to absorb estimated loan losses inherent in the loan portfolio. Factors contributing to the determination of reserves include the credit-worthiness of the borrower, changes in the value of pledged collateral and general economic conditions. All loan commitments rated substandard or worse and greater than $500,000 are specifically reviewed for loss potential. For loans deemed to be impaired, a specific allocation is assigned based on the losses expected to be realized from those loans. For purposes of determining the general reserve, the portfolio is segregated by product types to recognize differing risk profiles among categories, and then further segregated by credit grades. Credit grades are assigned to all loans. Each credit grade is assigned a risk factor, or reserve allocation percentage. These risk factors are multiplied by the outstanding principal balance and risk-weighted by product type to calculate the required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit, and any needed reserve is recorded in other liabilities. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management’s judgment, should be charged off.

We have several pass credit grades that are assigned to loans based on varying levels of risk, ranging from credits that are secured by cash or marketable securities, to watch credits which have all the characteristics of an acceptable credit risk but warrant more than the normal level of monitoring. Within our criticized/classified credit grades are special mention, substandard and doubtful. Special mention loans are those that are currently protected by the current sound worth and paying capacity of the borrower, but that are potentially weak and constitute an additional credit risk. The loan has the potential to deteriorate to a substandard grade due to the existence of financial or administrative deficiencies. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Some substandard loans are insufficiently protected by the current sound worth and paying capacity of the borrower and of the collateral pledged and may be considered impaired. Substandard loans can be accruing or can be on non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on non-accrual.

The reserve allocation percentages assigned to each credit grade have been developed based primarily on an analysis of our historical loss rates. The allocations are adjusted for certain qualitative factors for such things as general economic conditions and changes in credit policies and lending standards. Changes in the trend and severity of problem loans can cause the estimation of losses to differ from past experience. In addition, the reserve reflects the results of reviews performed by independent third party reviewers as reflected in their confirmations of assigned credit grades within the portfolio. The portion of the allowance that is not derived by the allowance allocation percentages compensates for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. Examples of risks that support the Bank's maintaining an unallocated reserve include the possibility of precipitous negative changes in economic conditions and borrowers' submission of financial statements or certifications of collateral value that subsequently prove to be materially inaccurate for reason of either misstatement or omission of critical information. These situations, while not common, do not necessarily correlate well with the general risk profile presented by assigned credit grade and product type categories. We evaluate many factors and conditions in determining the unallocated portion of the allowance, including amount and frequency of losses attributable to issues not specifically addressed or included in the determination and application of the allowance allocation percentages. The allowance is considered appropriate, given management’s assessment of probable losses within the portfolio as of the evaluation date, the significant growth in the loan and lease portfolio, current economic conditions in the Company’s market areas and other factors.

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The methodology used in the periodic review of reserve appropriateness, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality. The changes are reflected in the general reserve and in specific reserves as the collectability of larger classified loans is evaluated with new information. As our portfolio has matured, historical loss ratios have been closely monitored, and our reserve appropriateness relies primarily on our loss history. The review of the reserve appropriateness is performed by executive management and presented to a committee of our board of directors for their review. The committee reports to the board as part of the board’s review on a quarterly basis of the Company’s consolidated financial statements.

The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,933,412	$	5,408,750	$	1,557,507	$	2,939,032	$	17,640	$	85,253	$	15,941,594
Special mention	139,110		—		—		7,153		9		4,065		150,337
Substandard-accruing	57,283		—		2,038		2,619		219		3,561		65,720
Non-accrual	59,153		—		—		8,982		—		172		68,307
Total loans held for investment	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,738,474	$	4,102,125	$	1,414,671	$	2,785,804	$	19,579	$	91,044	$	14,151,697
Special mention	53,839		—		1,734		8,723		11		4,363		68,670
Substandard-accruing	43,784		—		—		2,653		47		3,915		50,399
Non-accrual	33,122		—		—		9,947		62		173		43,304
Total loans held for investment	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070

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The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2015 and March 31, 2014. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2015
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	70,654	$	—	$	7,935		$	15,582		$	240	$	1,141		$	5,402		$	100,954
Provision for loan losses	23,375		—		(3,472		)	(5,601		)	149		(138		)	(4,068		)	10,245
Charge-offs	3,102		—		—			346			62		—			—			3,510
Recoveries	286		—		83			8			4		8			—			389
Net charge-offs (recoveries)	2,816		—		(83		)	338			58		(8		)	—			3,121
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
Period end amount allocated to:
Loans individually evaluated for impairment	$	10,958	$	—	$	—		$	248		$	—	$	26		$	—		$	11,232
Loans collectively evaluated for impairment	80,255		—		4,546			9,395			331		985			1,334			96,846
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
March 31, 2014
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	39,868	$	—	$	14,553		$	24,210		$	149	$	3,105		$	5,719		$	87,604
Provision for loan losses	6,245		—		583			(495		)	56		(575		)	(1,104		)	4,710
Charge-offs	2,336		—		—			—			61		50			—			2,447
Recoveries	210		—		—			8			25		124			—			367
Net charge-offs (recoveries)	2,126		—		—			(8		)	36		(74		)	—			2,080
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234
Period end amount allocated to:
Loans individually evaluated for impairment	$	6,029	$	—	$	—		$	993		$	1	$	6		$	—		$	7,029
Loans collectively evaluated for impairment	37,958		—		15,136			22,730			168		2,598			4,615			83,205
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234

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Our recorded investment in loans as of March 31, 2015, December 31, 2014 and March 31, 2014 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of our impairment methodology was as follows (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	61,233	$	—	$	—	$	11,910	$	—	$	172	$	73,315
Loans collectively evaluated for impairment	6,127,725		5,408,750		1,559,545		2,945,876		17,868		92,879		16,152,643
Total	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	35,165	$	—	$	—	$	13,880	$	62	$	173	$	49,280
Loans collectively evaluated for impairment	5,834,054		4,102,125		1,416,405		2,793,247		19,637		99,322		14,264,790
Total	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070
March 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	29,023	$	—	$	—	$	21,112	$	8	$	42	$	50,185
Loans collectively evaluated for impairment	5,176,492		2,688,044		1,437,609		2,208,237		14,807		95,220		11,620,409
Total	$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594

We have traditionally maintained an unallocated reserve component to compensate for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. We believe the level of unallocated reserves at March 31, 2015 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from borrowers' misstatement of financial information or inaccurate certification of collateral values. Such losses are not necessarily correlated with historical loss trends or general economic conditions. Our methodology used to calculate the allowance considers historical losses; however, the historical loss rates for specific product types or credit risk grades may not fully incorporate the effects of continued weakness in the economy.

Generally we place loans on non-accrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining unpaid principal amount of the loan is deemed to be fully collectible. If collectability is questionable, then cash payments are applied to principal. As of March 31, 2015, $964,000 of our non-accrual loans were earning on a cash basis compared to $310,000 at December 31, 2014. A loan is placed back on accrual status when both principal and interest are current and it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement.

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A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. In accordance with ASC 310 Receivables ("ASC 310"), we have also included all restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class, as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	31,214	$	35,375	$	—	$	16,810	$	—
Energy	1,266		1,266		—		422		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	3,688		3,688		—		3,719		—
Commercial	4,132		4,132		—		3,725		—
Secured by 1-4 family	—		—		—		—		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	40,300	$	44,461	$	—	$	24,676	$	10
With an allowance recorded:
Commercial
Business loans	$	28,117	$	28,117	$	10,860	$	25,741	$	—
Energy	636		636		98		881		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	1,944		1,944		46		3,451		—
Commercial	436		436		65		496		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans with an allowance recorded	$	33,015	$	33,015	$	11,232	$	32,616	$	—
Combined:
Commercial
Business loans	$	59,331	$	63,492	$	10,860	$	42,551	$	—
Energy	1,902		1,902		98		1,303		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	5,632		5,632		46		7,170		—
Commercial	4,568		4,568		65		4,221		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans	$	73,315	$	77,476	$	11,232	$	57,292	$	10

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December 31, 2014
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	9,608	$	11,857	$	—	$	7,334	$	—
Energy	—		—		—		375		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	3,735		3,735		—		7,970		—
Commercial	3,521		3,521		—		2,795		—
Secured by 1-4 family	—		—		—		1,210		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	16,864	$	19,113	$	—	$	19,802	$	25
With an allowance recorded:
Commercial
Business loans	$	24,553	$	25,553	$	7,433	$	17,705	$	—
Energy	1,004		1,004		272		991		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	4,203		4,203		317		5,064		—
Commercial	526		526		79		705		—
Secured by 1-4 family	1,895		1,895		240		2,119		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans with an allowance recorded	$	32,416	$	33,416	$	8,376	$	26,641	$	—
Combined:
Commercial
Business loans	$	34,161	$	37,410	$	7,433	$	25,039	$	—
Energy	1,004		1,004		272		1,366		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	7,938		7,938		317		13,034		—
Commercial	4,047		4,047		79		3,500		—
Secured by 1-4 family	1,895		1,895		240		3,329		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans	$	49,280	$	52,529	$	8,376	$	46,443	$	25

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Average impaired loans outstanding during the three months ended March 31, 2015 and 2014 totaled $57.3 million and $43.4 million, respectively.

The table below provides an age analysis of our past due loans that are still accruing and non-accrual loans, by portfolio class, as of March 31, 2015 (in thousands):

	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days and Accruing(1)		Total Past Due		Non-accrual		Current		Total
Commercial
Business loans	$	17,210	$	2,591	$	2,846	$	22,647	$	57,251	$	4,970,584	$	5,050,482
Energy	—		—		—		—		1,902		1,136,574		1,138,476
Mortgage finance loans	—		—		—		—		—		5,408,750		5,408,750
Construction
Market risk	2,845		—		—		2,845		—		1,540,220		1,543,065
Secured by 1-4 family	—		—		—		—		—		16,480		16,480
Real estate
Market risk	5,222		—		125		5,347		3,827		2,282,609		2,291,783
Commercial	—		—		—		—		4,568		568,745		573,313
Secured by 1-4 family	407		—		—		407		587		91,696		92,690
Consumer	422		43		—		465		—		17,403		17,868
Leases	3,118		—		—		3,118		172		89,761		93,051
Total loans held for investment	$	29,224	$	2,634	$	2,971	$	34,829	$	68,307	$	16,122,822	$	16,225,958

(1) Loans past due 90 days and still accruing includes premium finance loans of $2.8 million. These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

Restructured loans are loans on which, due to the borrower’s financial difficulties, we have granted a concession that we would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, a reduction of the face amount of debt or forgiveness of either principal or accrued interest. As of March 31, 2015 and December 31, 2014, we had $319,000 and $1.8 million, respectively, in loans considered restructured that are not on non-accrual. These loans did not have unfunded commitments at March 31, 2015 or December 31, 2014. Of the non-accrual loans at March 31, 2015 and December 31, 2014, $12.7 million and $12.1 million, respectively, met the criteria for restructured. These loans had no unfunded commitments at their respective balance sheet dates. A loan continues to qualify as restructured until a consistent payment history or change in borrower’s financial condition has been evidenced, generally no less than twelve months. Assuming that the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that we are willing to accept for a new extension of credit with comparable risk, then the loan no longer has to be considered a restructuring if it is in compliance with modified terms in calendar years after the year of the restructure.

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The following tables summarize, for the three months ended March 31, 2015 and 2014, loans that were restructured during 2015 and 2014 (in thousands):

March 31, 2015
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Commercial business loans	2	$	1,369	$	1,369
Total new restructured loans in 2015	2	$	1,369	$	1,369
March 31, 2014
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Real estate—commercial	1	$	1,441	$	1,441
Total new restructured loans in 2014	1	$	1,441	$	1,441

The restructured loans generally include terms to temporarily place loans on interest only, extend the payment terms or reduce the interest rate. We did not forgive any principal on the above loans. The restructuring of the loans did not have a significant impact on our allowance for loan losses at March 31, 2015 or 2014.

The following table provides information on how restructured loans were modified during the three months ended March 31, 2015 and 2014 (in thousands):

	Three months ended March 31,
	2015		2014
Extended maturity	$	—	$	1,441
Combination of maturity extension and payment schedule adjustment	1,369		—
Total	$	1,369	$	1,441

As of March 31, 2015 and 2014, we did not have any loans that were restructured within the last 12 months that subsequently defaulted.

(5) OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO

The table below presents a summary of the activity related to OREO (in thousands):

	Three months ended March 31,
	2015			2014
Beginning balance	$	568		$	5,110
Additions	1,092			851
Sales	(1,055		)	(3,541		)
Valuation allowance for OREO	—			—
Direct write-downs	—			—
Ending balance	$	605		$	2,420

(6) FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK

The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit which involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Bank uses the

19

same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the borrower.

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s credit-worthiness on a case-by-case basis.

Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.

The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands):

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	5,178,514	$	5,324,460
Standby letters of credit	173,198		177,808

(7) REGULATORY MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company’s and the Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

In July 2013, the Federal Reserve published final rules for the adoption of the Basel III regulatory capital framework (the "Basel III Capital Rules"). The Basel III Capital Rules, among other things, (i) introduce a new capital measure called "Common Equity Tier 1" ("CET1"), (ii) specify that Tier 1 capital consist of Common Equity Tier 1 and "Additional Tier 1 Capital" instruments meeting specified requirements, (iii) define Common Equity Tier 1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to Common Equity Tier 1 and not to the other components of capital and (iv) expand the scope of the deductions/adjustments as compared to existing regulations. The Basel III Capital Rules became effective for us on January 1, 2015 with certain transition provisions fully phased in on January 1, 2019.

Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios CET1, Tier 1 and Total capital to risk-weighted assets, and of Tier 1 capital to average assets, each as defined in the regulations. Management believes, as of March 31, 2015, that the Company and the Bank met all capital adequacy requirements to which they are subject.

Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based, CET1 and Tier 1 leverage ratios. As shown in the table below, the Company’s capital ratios exceeded the regulatory definition of adequately capitalized as of March 31, 2015, and December 31, 2014. Based upon the information in its most recently filed call report, the Bank met the capital ratios necessary to be well capitalized. The regulatory authorities can apply changes in classification of assets and such changes may retroactively subject the Company to changes in capital ratios. Any such changes could result in reducing one or more capital ratios below well-capitalized status. In addition, a change may result in imposition of additional assessments by the FDIC or could result in regulatory actions that could have a material effect on condition and results of operations.

Because our bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, we are allowed to continue to classify our trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital.

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The table below summarizes our capital ratios:

	March 31, 2015		December 31, 2014
Company
Risk-based capital:
CET1(1)	7.18	%	7.89	%
Tier 1 capital	8.57	%	9.46	%
Total capital	10.71	%	11.83	%
Leverage	9.53	%	10.76	%

(1) December 31, 2014 ratio is unaudited.

Our mortgage finance loan volumes can increase significantly at month-end, causing a meaningful difference between ending balance and average balance for any period. At March 31, 2015, our total mortgage finance loans were $5.4 billion compared to the average for the quarter ended March 31, 2015 of $3.7 billion. As CET1, Tier 1 and total capital ratios are calculated using ending risk-weighted assets and our mortgage finance loans are 100% risk-weighted, the quarter-end fluctuation in these balances can significantly impact our reported ratios. Due to the risk profile and liquidity of this asset class, we manage capital allocated to mortgage finance loans based on changing trends in average balances and do not believe that the quarter-end balance is representative of risk characteristics that would justify higher allocations. However, we will continue to monitor our capital allocation to confirm that all capital levels remain above well-capitalized levels.

Dividends that may be paid by subsidiary banks are routinely restricted by various regulatory authorities. The amount that can be paid in any calendar year without prior approval of the Bank’s regulatory agencies cannot exceed the lesser of the net profits (as defined) for that year plus the net profits for the preceding two calendar years, or retained earnings. The Basel III Capital Rules further limit the amount of dividends that may be paid by our bank. No dividends were declared or paid on common stock during the three months ended March 31, 2015 or 2014.

(8) STOCK-BASED COMPENSATION

The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.

Stock-based compensation consists of SARs and RSUs granted from 2009 through March 31, 2015.

	Three months ended March 31,
(in thousands)	2015		2014
Stock- based compensation expense recognized:
SARs	$	104	$	143
RSUs	887		1,119
Total compensation expense recognized	$	991	$	1,262

	March 31, 2015
(in thousands)	Options		SARs and RSUs
Unrecognized compensation expense related to unvested awards	$	—	$	11,804
Weighted average period over which expense is expected to be recognized, in years	N/A		3.5

In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units. A summary of the compensation cost for these units is as follows (in thousands):

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	Three months ended March 31,
	2015		2014
Cash-based performance units	$	1,366	$	3,393

(9) FAIR VALUE DISCLOSURES

ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and requires enhanced disclosures about fair value measurements. Fair value is defined under ASC 820 as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal market for the asset or liability in an orderly transaction between market participants on the measurement date.

We determine the fair market values of our assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. The standard describes three levels of inputs that may be used to measure fair value as provided below.

Level 1 Quoted prices in active markets for identical assets or liabilities.

Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include U.S. government and agency mortgage-backed debt securities, municipal bonds, and Community Reinvestment Act funds. This category includes derivative assets and liabilities where values are obtained from independent pricing services.

Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant management judgment or estimation. This category includes impaired loans and OREO where collateral values have been based on third party appraisals; however, due to current economic conditions, comparative sales data typically used in appraisals may be unavailable or more subjective due to lack of market activity.

Assets and liabilities measured at fair value at March 31, 2015 and December 31, 2014 are as follows (in thousands):

	Fair Value Measurements Using
March 31, 2015	Level 1		Level 2		Level 3
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	28,918	$	—
Municipals	—		1,313		—
Equity securities(2)	—		7,418		—
Loans(3) (5)	—		—		23,210
OREO(4) (5)	—		—		605
Derivative assets(6)	—		43,746		—
Derivative liabilities(6)	—		43,746		—
December 31, 2014
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	31,065	$	—
Municipals	—		3,267		—
Equity securities(2)	—		7,387		—
Loans(3) (5)	—		—		23,536
OREO(4) (5)	—		—		568
Derivative assets(6)	—		31,176		—
Derivative liabilities(6)	—		31,176		—

(1) Securities are measured at fair value on a recurring basis, generally monthly.

(2) Equity securities consist of Community Reinvestment Act funds.

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(3) Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

(4) OREO is transferred from loans to OREO at fair value less selling costs.

(5) Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

(6) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.

Level 3 Valuations

Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Currently, we measure fair value for certain loans and OREO on a nonrecurring basis as described below.

Loans

During three months ended March 31, 2015 and the year ended December 31, 2014, certain impaired loans were re-evaluated and reported at fair value through a specific allocation of the allowance for loan losses based upon the fair value of the underlying collateral. The $23.2 million total above includes impaired loans at March 31, 2015 with a carrying value of $26.2 million that were reduced by specific allowance allocations totaling $3.0 million for a total reported fair value of $23.2 million based on collateral valuations utilizing Level 3 valuation inputs. The $23.5 million total above includes impaired loans at December 31, 2014 with a carrying value of $29.2 million that were reduced by specific valuation allowance allocations totaling $5.7 million for a total reported fair value of $23.5 million based on collateral valuations utilizing Level 3 valuation inputs. Fair values were based on third party appraisals.

OREO

Certain foreclosed assets, upon initial recognition, are valued based on third party appraisals less estimated selling costs. At March 31, 2015 and December 31, 2014, OREO had a carrying value of $605,000 and $568,000, respectively, with no specific valuation allowance. The fair value of OREO was computed based on third party appraisals, which are Level 3 valuation inputs.

Fair Value of Financial Instruments

Generally accepted accounting principles require disclosure of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. This disclosure does not and is not intended to represent the fair value of the Company.

A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands):

	March 31, 2015				December 31, 2014
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	834,547	$	834,547	$	1,330,514	$	1,330,514
Securities, available-for-sale	37,649		37,649		41,719		41,719
Loans held for investment, net	16,061,650		16,067,528		14,156,058		14,161,484
Derivative assets	43,746		43,746		31,176		31,176
Deposits	14,122,306		14,122,653		12,673,300		12,673,607
Federal funds purchased	88,384		88,384		66,971		66,971
Customer repurchase agreements	37,074		37,074		25,705		25,705
Other borrowings	1,000,000		1,000,000		1,100,005		1,100,005
Subordinated notes	286,000		292,521		286,000		289,947
Trust preferred subordinated debentures	113,406		113,406		113,406		113,406
Derivative liabilities	43,746		43,746		31,176		31,176

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The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments:

Cash and cash equivalents

The carrying amounts reported in the consolidated balance sheet for cash and cash equivalents approximate their fair value, which is characterized as a Level 1 asset in the fair value hierarchy

Securities

The fair value of investment securities is based on prices obtained from independent pricing services which are based on quoted market prices for the same or similar securities, which is characterized as a Level 2 asset in the fair value hierarchy. We have obtained documentation from the primary pricing service we use about their processes and controls over pricing. In addition, on a quarterly basis we independently verify the prices that we receive from the service provider using two additional independent pricing sources. Any significant differences are investigated and resolved.

Loans, net

Loans are characterized as Level 3 assets in the fair value hierarchy. For variable-rate loans that reprice frequently with no significant change in credit risk, fair values are generally based on carrying values. The fair value for all other loans is estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Derivatives

The estimated fair value of interest rate swaps and caps are obtained from independent pricing services based on quoted market prices for the same or similar derivative contracts and are characterized as a Level 2 asset in the fair value hierarchy. On a quarterly basis, we independently verify the fair value using an additional independent pricing source.

Deposits

Deposits are characterized as Level 3 liabilities in the fair value hierarchy. The carrying amounts for variable-rate money market accounts approximate their fair value. Fixed-term certificates of deposit fair values are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities.

Federal funds purchased, customer repurchase agreements, other borrowings, subordinated notes and trust preferred subordinated debentures

The carrying value reported in the consolidated balance sheet for Federal funds purchased, customer repurchase agreements and other short-term, floating rate borrowings approximates their fair value, which are characterized as Level 2 assets in the fair value hierarchy. The fair value of any fixed rate short-term borrowings and trust preferred subordinated debentures is estimated using a discounted cash flow calculation that applies interest rates currently being offered on similar borrowings, which are characterized as Level 3 liabilities in the fair value hierarchy. The subordinated notes are publicly traded and are valued based on market prices, which are characterized as Level 2 liabilities in the fair value hierarchy.

(10) DERIVATIVE FINANCIAL INSTRUMENTS

The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty that are subject to a legally enforceable master netting agreement.

During three months ended March 31, 2015 and 2014, we entered into certain interest rate derivative positions that are not designated as hedging instruments. These derivative positions relate to transactions in which we enter into an interest rate swap, cap and/or floor with a customer while at the same time entering into an offsetting interest rate swap, cap and/or floor with another financial institution. In connection with each swap transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert

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a variable rate loan to a fixed rate. Because we act as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on our results of operations.

The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2015 and December 31, 2014 are presented in the following tables (in thousands):

	March 31, 2015						December 31, 2014
	Estimated Fair Value						Estimated Fair Value
	Notional Amount		Asset Derivative		Liability Derivative		Notional Amount		Asset Derivative			Liability Derivative
Non-hedging interest rate derivatives:
Financial institution counterparties:
Commercial loan/lease interest rate swaps	$	986,688	$	—	$	41,868	$	866,432	$	361		$	30,162
Commercial loan/lease interest rate caps	158,403		1,878		—		63,414		1,014			—
Customer counterparties:
Commercial loan/lease interest rate swaps	986,688		41,868		—		866,432		30,162			361
Commercial loan/lease interest rate caps	158,403		—		1,878		63,414		—			1,014
Gross derivatives			43,746		43,746				31,537			31,537
Offsetting derivative assets/liabilities			—		—				(361		)	(361		)
Net derivatives included in the consolidated balance sheets			$	43,746	$	43,746			$	31,176		$	31,176

The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2015 were as follows:

	March 31, 2015 Weighted-Average Interest Rate				December 31, 2014 Weighted-Average Interest Rate
	Received		Paid		Received		Paid
Non-hedging interest rate swaps	2.74	%	4.70	%	2.79	%	4.82	%

The weighted-average strike rate for outstanding interest rate caps was 2.14% at March 31, 2015 and 1.44% at December 31, 2014.

Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial. Our credit exposure, net of any collateral pledged, relating to interest rate swaps and caps was approximately $43.7 million at March 31, 2015 and approximately $31.2 million at December 31, 2014, all of which relates to bank customers. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap and cap values. At March 31, 2015 and December 31, 2014, we had $44.0 million and $30.2 million, respectively, in cash collateral pledged for these derivatives included in interest-bearing deposits.

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(11) NEW ACCOUNTING PRONOUNCEMENTS

ASU 2014-09 "Revenue from Contracts with Customers (Topic 606)" ("ASU 2014-09") implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. ASU 2014-09 is effective for annual and interim periods beginning after December 15, 2016 and is not expected to have a significant impact on our consolidated financial statements.

ASU 2014-12 "Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period" ("ASU 2014-12") requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is intended to resolve the diverse accounting treatments of these types of awards in practice and is effective for annual and interim periods beginning after December 15, 2015. It is not expected to have a significant impact on our consolidated financial statements.

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QUARTERLY FINANCIAL SUMMARY – UNAUDITED

Consolidated Daily Average Balances, Average Yields and Rates

(In thousands)

	For the three months ended   March 31, 2015						For the three months ended   March 31, 2014
	Average Balance		Revenue/ Expense(1)		Yield/ Rate		Average Balance		Revenue/ Expense(1)		Yield/ Rate
Assets
Securities – taxable	$	37,145	$	332	3.62	%	$	47,027	$	442	3.81	%
Securities – non-taxable(2)	2,785		40		5.82	%	10,554		151		5.80	%
Federal funds sold	191,297		116		0.25	%	73,746		40		0.22	%
Deposits in other banks	2,019,567		1,260		0.25	%	230,296		159		0.28	%
Loans held for investment, mortgage finance loans	3,746,938		27,631		2.99	%	2,027,264		16,782		3.36	%
Loans held for investment	10,502,172		111,543		4.31	%	8,717,969		99,090		4.61	%
Less reserve for loan losses	101,042		—		—		87,686		—		—
Loans, net of reserve	14,148,068		139,174		3.99	%	10,657,547		115,872		4.41	%
Total earning assets	16,398,862		140,922		3.49	%	11,019,170		116,664		4.29	%
Cash and other assets	459,030						382,198
Total assets	$	16,857,892					$	11,401,368
Liabilities and Stockholders’ Equity
Transaction deposits	$	1,401,626	$	444	0.13	%	$	782,301	$	80	0.04	%
Savings deposits	5,891,344		4,420		0.30	%	4,591,493		3,304		0.29	%
Time deposits	447,681		506		0.46	%	375,563		351		0.38	%
Deposits in foreign branches	304,225		258		0.34	%	355,857		295		0.34	%
Total interest bearing deposits	8,044,876		5,628		0.28	%	6,105,214		4,030		0.27	%
Other borrowings	1,172,675		462		0.16	%	293,012		171		0.24	%
Subordinated notes	286,000		4,191		5.94	%	227,667		3,479		6.20	%
Trust preferred subordinated debentures	113,406		618		2.21	%	113,406		616		2.20	%
Total interest bearing liabilities	9,616,957		10,899		0.46	%	6,739,299		8,296		0.50	%
Demand deposits	5,592,124						3,381,501
Other liabilities	152,639						103,514
Stockholders’ equity	1,496,172						1,177,054
Total liabilities and stockholders’ equity	$	16,857,892					$	11,401,368
Net interest income(2)			$	130,023					$	108,368
Net interest margin					3.22	%					3.99	%
Net interest spread					3.03	%					3.79	%
Loan spread					3.82	%					4.24	%

(1) The loan averages include loans on which the accrual of interest has been discontinued and are stated net of unearned income.

(2) Taxable equivalent rates used where applicable.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

Statements and financial analysis contained in this report that are not historical facts are forward-looking statements made pursuant to the safe harbor provisions of federal securities laws. Forward-looking statements may also be contained in our future filings with SEC, in press releases and in oral and written statements made by us or with our approval that are not statements of historical fact. Forward-looking statements describe our future plans, strategies and expectations and are based on certain assumptions. Words such as “believes”, “expects,” “estimates,” “anticipates”, “plans”, “goals”, “objectives”, “expects”, “intends”, “seeks”, “likely”, “targeted”, “continue”, “remain”, “will”, “should”, “may” and other similar expressions are intended to identify forward-looking statements but are not the exclusive means of identifying such statements. Forward-looking statements may include, among other things, statements about our confidence in our strategies and our expectations about financial performance, market growth, market and regulatory trends and developments, acquisitions and divestitures, new technologies, services and opportunities and earnings.

Forward-looking statements are subject to various risks and uncertainties, which change over time, are based on management’s expectations and assumptions at the time the statements are made and are not guarantees of future results. Important factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to, the following:

• Deterioration of the credit quality of our loan portfolio, increased default rates and loan losses or adverse changes in the industry concentrations of our loan portfolio.

• Developments adversely affecting our commercial, entrepreneurial and professional customers.

• Changes in the U.S. economy in general or the Texas economy specifically resulting in deterioration of credit quality or reduced demand for credit or other financial services we offer, including declines and volatility in oil and gas prices.

• Changes in the value of commercial and residential real estate securing our loans or in the demand for credit to support the purchase and ownership of such assets.

• The failure of assumptions supporting our allowance for loan losses causing it to become inadequate as loan quality decreases and losses and charge-offs increase.

• A failure to effectively manage our interest rate risk resulting from unexpectedly large or sudden changes in interest rates or rate or maturity imbalances in our assets and liabilities.

• Failure to execute our business strategy, including any inability to expand into new markets and lines of business in Texas, regionally and nationally.

• Loss of access to capital market transactions and other sources of funding, or a failure to effectively balance our funding sources with cash demands by depositors and borrowers.

• Failure to successfully develop and launch new lines of business and new products and services within the expected time frames and budgets, or failure to anticipate and appropriately manage the associated risks.

• The failure to attract and retain key personnel or the loss of key individuals or groups of employees.

• Legislative and regulatory changes imposing further restrictions and costs on our business, a failure to remain well capitalized or well managed or regulatory enforcement actions against us.

• An increase in the incidence or severity of fraud, illegal payments, security breaches and other illegal acts impacting our bank and our customers.

• Structural changes in the markets for origination, sale and servicing of residential mortgages.

• Increased or more effective competition from banks and other financial service providers in our markets.

• Material failures of our accounting estimates and risk management processes based on management judgment, or the supporting analytical and forecasting models.

• Unavailability of funds obtained from capital transactions or from our bank to fund our obligations.

• Failures of counterparties or third party vendors to perform their obligations.

• Failures or breaches of our information systems that are not effectively managed.

• Severe weather, natural disasters, acts of war or terrorism and other external events.

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• Incurrence of material costs and liabilities associated with legal and regulatory proceedings and related matters with respect to the financial services industry, including those directly involving us or our bank.

• Failure of our risk management strategies and procedures, including failure or circumvention of our controls.

Actual outcomes and results may differ materially from what is expressed in our forward-looking statements and from our historical financial results due to the factors discussed elsewhere in this report or disclosed in our other SEC filings. Forward-looking statements included herein should not be relied upon as representing our expectations or beliefs as of any date subsequent to the date of this report. Except as required by law, we undertake no obligation to revise any forward-looking statements contained in this report, whether as a result of new information, future events or otherwise. The factors discussed herein are not intended to be a complete summary of all risks and uncertainties that may affect our businesses. Though we strive to monitor and mitigate risk, we cannot anticipate all potential economic, operational and financial developments that may adversely impact our operations and our financial results. Forward-looking statements should not be viewed as predictions and should not be the primary basis upon which investors evaluate an investment in our securities.

Overview of Our Business Operations

We commenced our banking operations in December 1998. An important aspect of our growth strategy has been our ability to service and effectively manage a large number of loans and deposit accounts in multiple markets in Texas, as well as several lines of business serving a regional or national clientèle of commercial borrowers. Accordingly, we have created an operations infrastructure sufficient to support our lending and banking operations that we continue to build out as needed to serve a larger customer base and specialized industries.

The following discussion and analysis presents the significant factors affecting our financial condition as of March 31, 2015 and December 31, 2014 and results of operations for three months in the periods ended March 31, 2015 and 2014. This discussion should be read in conjunction with our consolidated financial statements and notes to the financial statements appearing in Part I, Item 1 of this report.

Results of Operations

Summary of Performance

We reported net income of $35.1 million and net income available to common stockholders of $32.6 million, or $0.70 per diluted common share, for the first quarter of 2015 compared to net income of $28.3 million and net income available to common stockholders of $25.8 million, or $0.60 per diluted common share, for the first quarter of 2014. Return on average common equity (“ROE”) was 9.82% and return on average assets ("ROA") was .84% for the first quarter of 2015, compared to 10.20% and 1.01%, respectively, for the first quarter of 2014. The ROE decrease resulted from an increase in average common equity for the three months ended March 31, 2015, as compared to the same period in 2014, related to the equity offering completed in December 2014. The offering increased total equity by $149.7 million, and also had a dilutive effect on earnings per common share for the three months ended March 31, 2015 as compared to the same period in 2014. The ROA decrease resulted from a combination of reduced yields on loans and a $1.9 billion increase in average liquidity assets for the three months ended March 31, 2015 compared to the same period of 2014.

Net income increased $6.8 million, or 24%, for the three months ended March 31, 2015, as compared to the same period in 2014. The increase was primarily the result of a $21.7 million increase in net interest income and a $1.9 million increase in non-interest income, offset by a $6.0 million increase in the provision for credit losses, a $7.2 million increase in non-interest expense and a $3.6 million increase in income tax expense.

Details of the changes in the various components of net income are further discussed below.

Net Interest Income

Net interest income was $130.0 million for the first quarter of 2015, compared to $108.3 million for the first quarter of 2014. The increase was due to an increase in average earning assets of $5.4 billion as compared to the first quarter of 2014. The increase in average earning assets included a $3.5 billion increase in average net loans and a $1.9 billion increase in average liquidity assets, offset by a $17.7 million decrease in average securities. For the quarter ended March 31, 2015, average net loans, liquidity assets and securities represented approximately 86%, 13% and less than 1%, respectively, of average earning assets compared to 97%, 2% and less than 1% for the same quarter of 2014.

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Average interest-bearing liabilities for the quarter ended March 31, 2015 increased $2.9 billion from the first quarter of 2014, which included a $1.9 billion increase in interest-bearing deposits, a $879.7 million increase in other borrowings and a $58.3 million increase in long-term debt as a result of the Bank’s issuance of subordinated notes in January 2014. Average demand deposits increased from $3.4 billion at March 31, 2014 to $5.6 billion at March 31, 2015. The average cost of total deposits and borrowed funds remained flat at .17% for the first quarter of 2015 compared to the same period in the prior year. The cost of interest-bearing liabilities decreased from .50% for the quarter ended March 31, 2014 to .46% for the same period of 2015.

The following table (in thousands) presents changes in taxable-equivalent net interest income between the first quarter of 2014 and the first quarter of 2015 and identifies the changes due to differences in the average volume of earning assets and interest-bearing liabilities and changes due to changes in the average interest rate on those assets and liabilities.

	Three months ended March 31, 2015/2014
	Net			Change Due To(1)
	Change			Volume			Yield/Rate
Interest income:
Securities(2)	$	(221	)	$	(204	)	$	(17	)
Loans held for investment, mortgage finance loans	10,849			14,236			(3,387		)
Loans held for investment	12,453			20,276			(7,823		)
Federal funds sold	76			64			12
Deposits in other banks	1,101			1,235			(134		)
Total	24,258			35,607			(11,349		)
Interest expense:
Transaction deposits	364			63			301
Savings deposits	1,116			935			181
Time deposits	155			67			88
Deposits in foreign branches	(37		)	(43		)	6
Borrowed funds	291			513			(222		)
Long-term debt	714			891			(177		)
Total	2,603			2,426			177
Net interest income	$	21,655		$	33,181		$	(11,526	)

(1) Changes attributable to both volume and yield/rate are allocated to both volume and yield/rate on an equal basis.

(2) Taxable equivalent rates used where applicable and assume a 35% tax rate.

Net interest margin, which is defined as the ratio of net interest income to average earning assets, was 3.22% for the first quarter of 2015 compared to 3.99% for the first quarter of 2014. The year over year decrease was due to the growth in loans with lower yields, and the $1.9 billion increase in average balances of liquidity assets, which includes Federal funds sold and deposits in other banks. Funding costs, including demand deposits and borrowed funds, remained at .17% for the first quarter of 2015 compared to .17% for the first quarter of 2014. The spread on total earning assets, net of the cost of deposits and borrowed funds, was 3.32% for the first quarter of 2015 compared to 4.12% for the first quarter of 2014. The decrease resulted from the significant increase in liquidity assets coupled with a reduction in yields on total loans, primarily due to the increased proportion of mortgage finance loans to total loans. Total funding costs, including all deposits, long-term debt and stockholders’ equity decreased to .26% for the first quarter of 2015 compared to .30% for the first quarter of 2014. Average long-term debt increased by $58.3 million from the first quarter of 2014 and the average interest rate on long-term debt for the first quarter of 2015 was 4.88% compared to 4.87% for the same period of 2014.

Non-interest Income

The components of non-interest income were as follows (in thousands):

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	Three months ended March 31,
	2015		2014
Service charges on deposit accounts	$	2,094	$	1,696
Trust fee income	1,200		1,282
Bank owned life insurance (BOLI) income	484		509
Brokered loan fees	4,232		2,824
Swap fees	1,986		1,224
Other	2,271		2,821
Total non-interest income	$	12,267	$	10,356

Non-interest income increased $1.9 million during the three months ended March 31, 2015 compared to the same period of 2014. This increase was primarily due to a $1.4 million increase in brokered loan fees as a result of an increase in mortgage finance volumes during the first quarter of 2015. Swap fees increased $762,000 during the three months ended March 31, 2015 compared to the same period of 2014. These fees fluctuate from quarter to quarter based on the number and volume of transactions closed during the quarter. Swap fees are fees related to customer swap transactions and are received from the institution that is our counterparty on the transaction. Offsetting these increases was a $550,000 decrease in other non-interest income. Other non-interest income includes such items as letter of credit fees and other general operating income, none of which account for 1% or more of total interest income and non-interest income.

While management expects continued growth in certain components of non-interest income, the future rate of growth could be affected by increased competition from nationwide and regional financial institutions. In order to achieve growth in non-interest income, we may need to introduce new products or enter into new lines of business or expand existing lines of business. Any new product introduction or new market entry could place additional demands on capital and managerial resources.

Non-interest Expense

The components of non-interest expense were as follows (in thousands):

	Three months ended March 31,
	2015		2014
Salaries and employee benefits	$	45,828	$	42,056
Net occupancy expense	5,691		4,768
Marketing	4,218		3,759
Legal and professional	4,048		5,402
Communications and technology	5,078		3,924
FDIC insurance assessment	3,790		2,725
Allowance and other carrying costs for OREO	9		45
Other(1)	7,855		6,638
Total non-interest expense	$	76,517	$	69,317

(1) Other expense includes such items as courier expenses, regulatory assessments other than FDIC insurance, due from bank charges and other general operating expenses, none of which account for 1% or more of total interest income and non-interest income.

Non-interest expense for the first quarter of 2015 increased $7.2 million, or 10%, to $76.5 million from $69.3 million in the first quarter of 2014. The increase is primarily attributable to a $3.8 million increase in salaries and employee benefits expense due to general business growth and as we respond to continued regulatory changes and strategic initiatives.

Net occupancy expense for the three months ended March 31, 2015 increased $923,000 as a result of general business growth and continued build-out needed to support that growth.

Legal and professional expense for three months ended March 31, 2015 decreased $1.4 million compared to the same quarter of 2014. Our legal and professional expense will continue to fluctuate and could increase in the future due to general business growth and as we respond to continued regulatory changes and strategic initiatives.

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Communications and technology expense for the three months ended March 31, 2015 increased $1.2 million as a result of general business and customer growth and continued build-out needed to support that growth.

FDIC insurance assessment expense for the three months ended March 31, 2015 increased $1.1 million compared to the same quarter in 2014 as a result of the increase in total assets from March 31, 2014 to March 31, 2015.

Analysis of Financial Condition

Loan Portfolio

Loans were as follows as of the dates indicated (in thousands):

	March 31, 2015			December 31, 2014
Commercial	$	6,188,958		$	5,869,219
Mortgage finance	5,408,750			4,102,125
Construction	1,559,545			1,416,405
Real estate	2,957,786			2,807,127
Consumer	17,868			19,699
Leases	93,051			99,495
Gross loans held for investment	16,225,958			14,314,070
Deferred income (net of direct origination costs)	(56,230		)	(57,058		)
Allowance for loan losses	(108,078		)	(100,954		)
Total loans held for investment, net	$	16,061,650		$	14,156,058

Total loans net of allowance for loan losses at March 31, 2015 increased $1.9 billion from December 31, 2014 to $16.1 billion. Our business plan focuses primarily on lending to middle market businesses and successful professionals and entrepreneurs, and as such, commercial, real estate and construction loans have comprised a majority of our loan portfolio. Consumer loans generally have represented 1% or less of the portfolio. Mortgage finance loans relate to our mortgage warehouse lending operations in which we invest in mortgage loan ownership interests that are typically sold within 10 to 20 days. Volumes fluctuate based on the level of market demand for the product and the number of days between purchase and sale of the loans as well as overall market interest rates and tend to peak at the end of each month.

We originate a substantial majority of all loans held for investment (excluding mortgage finance loans). We also participate in syndicated loan relationships, both as a participant and as an agent. As of March 31, 2015, we had $1.7 billion in syndicated loans, $383.0 million of which we administer as agent. All syndicated loans, whether we act as agent or participant, are underwritten to the same standards as all other loans we originate. As of March 31, 2015, none of our syndicated loans were on non-accrual.

Portfolio Geographic Concentration

As of March 31, 2015, a substantial majority of our loans held for investment, excluding our mortgage finance loans and other national lines of business, were to businesses with headquarters and operations in Texas. This geographic concentration subjects the loan portfolio to the general economic conditions within this area. Additionally, we may make loans to these businesses and individuals, secured by assets located outside of Texas. The risks created by this concentration have been considered by management in the determination of the adequacy of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover estimated losses on loans at each balance sheet date.

Summary of Loan Loss Experience

The provision for credit losses is a charge to earnings to maintain the reserve for loan losses at a level consistent with management’s assessment of the loan portfolio in light of current economic conditions and market trends. We recorded a provision of $11.0 million during the first quarter of 2015 compared to $6.5 million in the fourth quarter of 2014 and $5.0 million in the first quarter of 2014. The provision was driven by the application of our methodology. The increase in provision recorded during three months ended March 31, 2015 was primarily related to the growth in loans held for investment, excluding mortgage finance loans, and the anticipated downgrades in energy credits.

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We continue to maintain an unallocated reserve component to compensate for the uncertainty and complexity in estimating loan and lease losses, including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. We believe the level of unallocated reserves at March 31, 2015 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from borrowers' misstatement of financial information or inaccurate certification of collateral values. Such losses are not necessarily correlated with historical loss trends or general economic conditions. Our methodology used to calculate the allowance considers historical losses; however, the historical loss rates for specific product types or credit risk grades may not fully incorporate the effects of continued weakness in the economy.

The reserve for loan losses is comprised of specific reserves for impaired loans and an estimate of losses inherent in the portfolio at the balance sheet date, but not yet identified with specified loans. We regularly evaluate our reserve for loan losses to maintain an appropriate level to absorb estimated loan losses inherent in the loan portfolio. Factors contributing to the determination of reserves include the creditworthiness of the borrower, changes in the value of pledged collateral, and general economic conditions. All loan commitments rated substandard or worse and greater than $500,000 are specifically reviewed for loss potential. For loans deemed to be impaired, a specific allocation is assigned based on the losses expected to be realized from those loans. For purposes of determining the general reserve, the portfolio is segregated by credit grades, and then further segregated by product types to recognize differing risk profiles among categories. Credit grades are assigned to all loans. Each credit grade is assigned a risk factor, or reserve allocation percentage. These risk factors are multiplied by the outstanding principal balance and risk-weighted by product type to calculate the required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management’s judgment, should be charged off.

The reserve allocation percentages assigned to each credit grade have been developed based primarily on an analysis of our historical loss rates. The allocations are adjusted for certain qualitative factors, including general economic conditions, changes in credit policies and lending standards. Changes in the trend and severity of problem loans can cause the estimation of losses to differ from past experience. In addition, the reserve considers the results of reviews performed by independent third party reviewers as reflected in their confirmations of assigned credit grades within the portfolio. The portion of the allowance that is not derived by the allowance allocation percentages compensates for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. Examples of risks that support the Bank's maintaining an unallocated reserve include the possibility of precipitous negative changes in economic conditions and borrowers' submission of financial statements or certifications of collateral value that subsequently prove to be materially inaccurate for reason of either misstatement or omission of critical information. These situations, while not common, do not necessarily correlate well with the general risk profile presented by assigned credit grade and product type categories. We evaluate many such factors and conditions in determining the unallocated portion of the allowance, including amount and frequency of losses attributable to issues not specifically addressed or included in the determination and application of the allowance allocation percentages. The allowance is considered appropriate, given management’s assessment of potential losses within the portfolio as of the evaluation date, the significant growth in the loan and lease portfolio, current economic conditions in the Company’s market areas and other factors.

The methodology used in the periodic review of reserve adequacy, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality. The changes are reflected in the general reserve and in specific reserves as the collectability of larger classified loans is evaluated with new information. As our portfolio has matured, historical loss ratios have been closely monitored, and our reserve adequacy relies primarily on our loss history. The review of the reserve adequacy is performed by executive management and presented to a committee of our board of directors for their review. The committee reports to the board as part of the board’s review on a quarterly basis of the Company’s consolidated financial statements.

The combined reserve for credit losses, which includes a liability for losses on unfunded commitments, totaled $115.9 million at March 31, 2015, $108.0 million at December 31, 2014 and $95.2 million at March 31, 2014. The total reserve percentage increased to 1.08% at March 31, 2015 from 1.06% and 1.07% of loans excluding mortgage finance loans at December 31, 2014 and March 31, 2014, respectively. At March 31, 2015, we believe the reserve is sufficient to cover all expected losses in the portfolio and has been derived from consistent application of the methodology described above. Should any of the factors considered by management in evaluating the adequacy of the allowance for loan losses change, our estimate of expected losses in the portfolio could also change, which would affect the level of future provisions for loan losses.

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Activity in the reserve for loan losses is presented in the following table (in thousands):

	Three months ended   March 31, 2015			Year ended December 31, 2014			Three months ended   March 31, 2014
Reserve for loan losses:
Beginning balance	$	100,954		$	87,604		$	87,604
Loans charged-off:
Commercial	3,102			9,803			2,336
Real estate	346			296			50
Consumer	62			266			61
Total charge-offs	3,510			10,365			2,447
Recoveries:
Commercial	286			2,762			210
Real estate	8			79			8
Construction	83			—			—
Consumer	4			162			25
Leases	8			1,082			124
Total recoveries	389			4,085			367
Net charge-offs	3,121			6,280			2,080
Provision for loan losses	10,245			19,630			4,710
Ending balance	$	108,078		$	100,954		$	90,234
Reserve for off-balance sheet credit losses:
Beginning balance	$	7,060		$	4,690		$	4,690
Provision for off-balance sheet credit losses	755			2,370			290
Ending balance	$	7,815		$	7,060		$	4,980
Total reserve for credit losses	$	115,893		$	108,014		$	95,214
Total provision for credit losses	$	11,000		$	22,000		$	5,000
Reserve for loan losses to loans	0.67		%	0.71		%	0.78		%
Reserve for loan losses to loans excluding mortgage finance loans	1.00		%	0.99		%	1.01		%
Net charge-offs to average loans(1)	0.09		%	0.05		%	0.08		%
Net charge-offs to average loans excluding mortgage finance loans(1)	0.12		%	0.07		%	0.10		%
Total provision for credit losses to average loans	0.31		%	0.18		%	0.19		%
Total provision for credit losses to average loans excluding mortgage finance loans	0.42		%	0.24		%	0.23		%
Recoveries to total charge-offs	11.08		%	39.41		%	15.00		%
Reserve for off-balance sheet credit losses to off-balance sheet credit commitments	0.15		%	0.13		%	0.12		%
Combined reserves for credit losses to loans held for investment	0.72		%	0.76		%	0.82		%
Combined reserves for credit losses to loans held for investment excluding mortgage finance loans	1.08		%	1.06		%	1.07		%
Non-performing assets:
Non-accrual loans(4)	$	68,307		$	43,304		$	43,213
OREO(3)	605			568			2,420
Total	$	68,912		$	43,872		$	45,633
Restructured loans	$	319		$	1,806		$	2,825
Loans past due 90 days and still accruing(2)	2,971			5,274			7,869
Reserve for loan losses to non-accrual loans	1.6x			2.3x			2.1x

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(1) Interim period ratios are annualized.

(2) At March 31, 2015, December 31, 2014 and March 31, 2014, loans past due 90 days and still accruing include premium finance loans of $2.8 million, $3.7 million and $4.7 million, respectively. These loans are generally secured by obligations of insurance carriers to refund premiums on cancelled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

(3) We did not have a valuation allowance recorded against the OREO balance at March 31, 2015, December 31, 2014 or March 31, 2014.

(4) As of March 31, 2015, December 31, 2014 and March 31, 2014, non-accrual loans included $12.7 million, $12.1 million and $16.3 million, respectively, in loans that met the criteria for restructured.

Non-performing Assets

Non-performing assets include non-accrual loans and leases and repossessed assets. The table below summarizes our non-accrual loans by type and OREO (in thousands):

	March 31, 2015		December 31, 2014		March 31, 2014
Commercial	$	59,153	$	33,122	$	26,834
Construction	—		—		—
Real estate	8,982		9,947		16,329
Consumer	—		62		8
Leases	172		173		42
Total non-accrual loans	68,307		43,304		43,213
Repossessed assets:
OREO	605		568		2,420
Total non-performing assets	$	68,912	$	43,872	$	45,633

The table below summarizes the non-accrual loans as segregated by loan type and type of property securing the credit as of March 31, 2015 (in thousands):

Non-accrual loans:
Commercial
Lines of credit secured by the following:
Oil and gas properties	$	1,591
Assets of the borrowers	56,329
Other	1,233
Total commercial	59,153
Real estate
Secured by:
Commercial property	4,133
Unimproved land and/or undeveloped residential lots	3,688
Other	1,161
Total real estate	8,982
Leases (commercial leases primarily secured by assets of the lessor)	172
Total non-accrual loans	$	68,307

Generally, we place loans on non-accrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining unpaid principal amount of the loan is deemed to be fully collectible. If collectability is questionable, then cash payments are applied to principal. A loan is placed back on accrual status when both principal and interest are current and

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it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement.

Potential problem loans consist of loans that are performing in accordance with contractual terms but for which we have concerns about the borrower’s ability to comply with repayment terms because of the borrower’s potential financial difficulties. We monitor these loans closely and review their performance on a regular basis. At March 31, 2015 and December 31, 2014, we had $14.0 million and $16.3 million, respectively, in loans of this type which were not included in either non-accrual or 90 days past due categories.

The following table summarizes the assets held in OREO at March 31, 2015 (in thousands):

Undeveloped land and residential lots	$	487
Other	118
Total OREO	$	605

When foreclosure occurs, fair value, which is generally based on appraised values, may result in partial charge-off of a loan upon taking the collateral, and so long as the collateral is retained, subsequent reductions in appraised values will result in valuation adjustments taken as non-interest expense. In addition, if the decline in value is believed to be permanent and not just driven by market conditions, a direct write-down to the OREO balance may be taken. We generally pursue sales of OREO when conditions warrant, but we may choose to hold certain properties for a longer term, which can result in additional exposure related to the appraised values during that holding period. We did not record a valuation expense during the three months ended March 31, 2015 or March 31, 2014.

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Liquidity and Capital Resources

In general terms, liquidity is a measurement of our ability to meet our cash needs. Our objective in managing our liquidity is to maintain our ability to meet loan commitments, purchase securities or repay deposits and other liabilities in accordance with their terms, without an adverse impact on our current or future earnings. Our liquidity strategy is guided by policies, which are formulated and monitored by our senior management and our Balance Sheet Management Committee (“BSMC”), and which take into account the demonstrated marketability of assets, the sources and stability of funding and the level of unfunded commitments. We regularly evaluate all of our various funding sources with an emphasis on accessibility, stability, reliability and cost effectiveness. For the year ended December 31, 2014 and for the three months ended March 31, 2015, our principal source of funding has been our customer deposits, supplemented by our short-term and long-term borrowings, primarily from Federal funds purchased and FHLB borrowings, generally used to fund mortgage finance assets.

Our liquidity needs for support of growth in loans held for investment have been fulfilled through growth in our core customer deposits. Our goal is to obtain as much of our funding for loans held for investment and other earning assets as possible from deposits of these core customers. These deposits are generated principally through development of long-term relationships with customers and stockholders, with a significant focus on treasury management products. In addition to deposits from our core customers, we also have access to deposits through brokered customer relationships. For regulatory purposes, these relationship brokered deposits are categorized as brokered deposits; however, since these deposits arise from a customer relationship, which involves extensive treasury services, we consider these deposits to be core deposits for our reporting purposes. We also have access to incremental deposits through brokered retail certificates of deposit, or CDs. These traditional brokered deposits are generally of short maturities, 30 to 90 days, and are used to supplement temporary differences in the growth in loans, compared to customer deposits. The following table summarizes our period-end and average year-to-date core customer deposits and brokered deposits (in millions):

	March 31, 2015			December 31, 2014			March 31, 2014
Deposits from core customers	$	12,409.4		$	10,900.0		$	8,173.9
Deposits from core customers as a percent of total deposits	87.9		%	86.0		%	84.0		%
Relationship brokered deposits	$	1,712.9		$	1,773.3		$	1,555.2
Relationship brokered deposits as a percent of total deposits	12.1		%	14.0		%	16.0		%
Traditional brokered deposits	$	—		$	—		$	—
Traditional brokered deposits as a percent of total deposits	—		%	—		%	—		%
Average deposits from core customers(1)	$	11,857.2		$	9,135.0		$	7,966.3
Average deposits from core customers as a percent of total quarterly average deposits(1)	86.9		%	84.1		%	84.0		%
Average relationship brokered deposits(1)	$	1,779.8		$	1,709.8		$	1,520.4
Average relationship brokered deposits as a percent of total quarterly average deposits(1)	13.1		%	15.7		%	16.0		%
Average traditional brokered deposits(1)	$	—		$	20.7		$	—
Average traditional brokered deposits as a percent of total quarterly average deposits(1)	—		%	0.2		%	—		%

(1) Annual averages presented for December 31, 2014.

We have access to sources of brokered deposits that we estimate to be $3.5 billion. Based on our internal guidelines, we may choose to limit our use of these sources to a lesser amount. Customer deposits (total deposits, including relationship brokered deposits, minus brokered CDs) at March 31, 2015 increased by $1.4 billion from December 31, 2014 and increased $4.4 billion from March 31, 2014.

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Additionally, we have short-term borrowing sources available to supplement deposits and meet our funding needs. Such borrowings are generally used to fund our mortgage finance assets, due to their liquidity, short duration and interest spreads available. These borrowing sources typically include Federal funds purchased from our downstream correspondent bank relationships (which consist of banks that are smaller than our bank) and from our upstream correspondent bank relationships (which consist of banks that are larger than our bank), customer repurchase agreements, treasury, tax and loan notes and advances from the FHLB and the Federal Reserve. The following table summarizes our short-term borrowings as of March 31, 2015 (in thousands):

Federal funds purchased	$	88,384
Repurchase agreements	37,074
FHLB borrowings	1,000,000
Total short-term borrowings	$	1,125,458
Maximum borrowings outstanding at any month-end during the year	$	1,153,967

The following table summarizes our other borrowing capacities in excess of balances outstanding at March 31, 2015 (in thousands):

FHLB borrowing capacity relating to loans	$	4,652,704
FHLB borrowing capacity relating to securities	458
Total FHLB borrowing capacity	$	4,653,162
Unused Federal funds lines available from commercial banks	$	1,226,000

The following table summarizes our long-term borrowings as of March 31, 2015 (in thousands):

Subordinated notes	$	286,000
Trust preferred subordinated debentures	113,406
Total long-term borrowings	$	399,406

At March 31, 2015, we had a non-revolving amortizing line of credit with $100.0 million of unused capacity. This line of credit matures on December 22, 2015. The loan proceeds may be used for general corporate purposes including funding regulatory capital infusions into the Bank. The loan agreement contains customary financial covenants and restrictions. At March 31, 2015 and December 31, 2014, no borrowings were outstanding.

Our equity capital, including $150 million in preferred stock, averaged $1.5 billion for the three months ended March 31, 2015, as compared to $1.2 billion for the same period in 2014. We have not paid any cash dividends on our common stock since we commenced operations and have no plans to do so in the foreseeable future.

As of March 31, 2015 our capital ratios were above the levels required to be well capitalized. We believe that our earnings, periodic capital raising transactions, and the addition of loan and deposit relationships, will allow us to continue to grow organically.

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Commitments and Contractual Obligations

The following table presents significant fixed and determinable contractual payment obligations to third parties by payment date. Payments for borrowings do not include interest. Payments related to leases are based on actual payments specified in the underlying contracts. As of March 31, 2015, our significant fixed and determinable contractual obligations to third parties, excluding interest, were as follows (in thousands):

	Within One Year		After One but Within Three Years		After Three but Within Five Years		After Five Years		Total
Deposits without a stated maturity	$	13,361,454	$	—	$	—	$	—	$	13,361,454
Time deposits	732,344		22,643		5,865		—		760,852
Federal funds purchased and customer repurchase agreements	125,458		—		—		—		125,458
FHLB borrowings	1,000,000		—		—		—		1,000,000
Operating lease obligations(1)	15,747		31,577		31,151		50,923		129,398
Subordinated notes	—		—		—		286,000		286,000
Trust preferred subordinated debentures	—		—		—		113,406		113,406
Total contractual obligations	$	15,235,003	$	54,220	$	37,016	$	450,329	$	15,776,568

(1) Non-balance sheet item.

Critical Accounting Policies

SEC guidance requires disclosure of “critical accounting policies.” The SEC defines “critical accounting policies” as those that are most important to the presentation of a company’s financial condition and results, and require management’s most difficult, subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain.

We follow financial accounting and reporting policies that are in accordance with accounting principles generally accepted in the United States. The more significant of these policies are summarized in Note 1 to the consolidated financial statements. Not all these significant accounting policies require management to make difficult, subjective or complex judgments. However, we believe the policy described below meets the SEC’s definition of a critical accounting policy.

Management considers the policies related to the allowance for loan losses as the most critical to the financial statement presentation. The total allowance for loan losses includes activity related to allowances calculated in accordance with ASC 310, Receivables, and ASC 450, Contingencies. The allowance for loan losses is established through a provision for loan losses charged to current earnings. The amount maintained in the allowance reflects management’s continuing evaluation of the loan losses inherent in the loan portfolio. The allowance for loan losses is comprised of specific reserves assigned to certain classified loans and general reserves. Factors contributing to the determination of specific reserves include the creditworthiness of the borrower, and more specifically, changes in the expected future receipt of principal and interest payments and/or in the value of pledged collateral. A reserve is recorded when the carrying amount of the loan exceeds the discounted estimated cash flows using the loan’s initial effective interest rate or the fair value of the collateral for certain collateral dependent loans. For purposes of determining the general reserve, the portfolio is segregated by product types in order to recognize differing risk profiles among categories, and then further segregated by credit grades. See “Summary of Loan Loss Experience” and Note 4 – Loans and Allowance for Loan Losses in the accompanying notes to the consolidated financial statements included elsewhere in this report for further discussion of the risk factors considered by management in establishing the allowance for loan losses.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is a broad term for the risk of economic loss due to adverse changes in the fair value of a financial instrument. These changes may be the result of various factors, including interest rates, foreign exchange rates, commodity prices, or equity prices. Additionally, the financial instruments subject to market risk can be classified either as held for trading purposes or held for other than trading.

We are subject to market risk primarily through the effect of changes in interest rates on our portfolio of assets held for purposes other than trading. Additionally, we have some market risk relative to commodity prices through our energy lending activities. Petroleum and natural gas commodity prices declined substantially during 2014. Such declines in commodity prices, if sustained or continued, could negatively impact our energy clients' ability to perform on their loan obligations. Management does not expect the current decline in petroleum and natural gas commodity prices to have a material adverse effect on our financial position. Foreign exchange rates, commodity prices and/or equity prices do not pose significant market risk to us.

The responsibility for managing market risk rests with the Balance Sheet Management Committee (“BSMC”), which operates under policy guidelines established by our board of directors. The negative acceptable variation in net interest revenue due to a 200 basis point increase or decrease in interest rates is generally limited by these guidelines to +/- 5%. These guidelines also establish maximum levels for short-term borrowings, short-term assets and public and brokered deposits. They also establish minimum levels for unpledged assets, among other things. Compliance with these guidelines is the ongoing responsibility of the BSMC, with exceptions reported to our board of directors on a quarterly basis. Additionally, the Credit Policy Committee ("CPC") specifically manages risk relative to commodity price market risks. The CPC establishes maximum portfolio concentration levels for energy loans as well as maximum advance rates for energy collateral.

Interest Rate Risk Management

Our interest rate sensitivity is illustrated in the following table. The table reflects rate-sensitive positions as of March 31, 2015, and is not necessarily indicative of positions on other dates. The balances of interest rate sensitive assets and liabilities are presented in the periods in which they next reprice to market rates or mature and are aggregated to show the interest rate sensitivity gap. The mismatch between repricings or maturities within a time period is commonly referred to as the “gap” for that period. A positive gap (asset sensitive), where interest rate sensitive assets exceed interest rate sensitive liabilities, generally will result in the net interest margin increasing in a rising rate environment and decreasing in a falling rate environment. A negative gap (liability sensitive) will generally have the opposite results on the net interest margin. To reflect anticipated prepayments, certain asset and liability categories are shown in the table using estimated cash flows rather than contractual cash flows. The Company employs interest rate floors in certain variable rate loans to enhance the yield on those loans at times when market interest rates are extraordinarily low. The degree of asset sensitivity, spreads on loans and net interest margin may be reduced until rates increase by an amount sufficient to eliminate the effects of floors. The adverse effect of floors as market rates increase may also be offset by the positive gap, the extent to which rates on deposits and other funding sources lag increasing market rates and changes in composition of funding.

40

Interest Rate Sensitivity Gap Analysis

March 31, 2015

(In thousands)

	0-3 mo Balance		4-12 mo Balance		1-3 yr Balance		3+ yr Balance			Total Balance
Assets:
Securities(1)	$	11,681	$	10,053	6,652		$	9,263		$	37,649
Total variable loans	14,364,905		53,036		—		—			14,417,941
Total fixed loans	351,387		913,091		296,885		246,654			1,808,017
Total loans(2)	14,716,292		966,127		296,885		246,654			16,225,958
Total interest sensitive assets	$	14,727,973	$	976,180	$	303,537	$	255,917		$	16,263,607
Liabilities:
Interest-bearing customer deposits	$	7,565,816	$	—	$	—	$	—		$	7,565,816
CDs & IRAs	200,749		276,416		22,643		5,865			505,673
Traditional brokered deposits	—		—		—		—			—
Total interest-bearing deposits	7,766,565		276,416		22,643		5,865			8,071,489
Repurchase agreements, Federal funds purchased, FHLB borrowings	1,125,458		—		—		—			1,125,458
Subordinated notes	—		—		—		286,000			286,000
Trust preferred subordinated debentures	—		—		—		113,406			113,406
Total borrowings	1,125,458		—		—		399,406			1,524,864
Total interest sensitive liabilities	$	8,892,023	$	276,416	$	22,643	$	405,271		$	9,596,353
GAP	$	5,835,950	$	699,764	$	280,894	$	(149,354	)	$	—
Cumulative GAP	5,835,950		6,535,714		6,816,608		6,667,254			6,667,254
Demand deposits										$	6,050,817
Stockholders’ equity										1,517,958
Total										$	7,568,775

(1) Securities based on fair market value.

(2) Loans are stated at gross.

The table above sets forth the balances as of March 31, 2015 for interest bearing assets, interest bearing liabilities, and the total of non-interest bearing deposits and stockholders’ equity. While a gap interest table is useful in analyzing interest rate sensitivity, an interest rate sensitivity simulation provides a better illustration of the sensitivity of earnings to changes in interest rates. Earnings are also affected by the effects of changing interest rates on the value of funding derived from demand deposits and stockholders’ equity. We perform a sensitivity analysis to identify interest rate risk exposure on net interest income. We quantify and measure interest rate risk exposure using a model to dynamically simulate the effect of changes in net interest income relative to changes in interest rates and loan and deposit account balances over the next twelve months based on three interest rate scenarios. These are a “most likely” rate scenario and two “shock test” scenarios.

The “most likely” rate scenario is based on the consensus forecast of future interest rates published by independent sources. These forecasts incorporate future spot rates and relevant spreads of instruments that are actively traded in the open market. The Federal Reserve’s Federal funds target affects short-term borrowing; the prime lending rate and the LIBOR are the basis for most of our variable-rate loan pricing. The 10-year mortgage rate is also monitored because of its effect on prepayment speeds for mortgage-backed securities. We believe these are our primary interest rate exposures. We are not currently using derivatives to manage our interest rate exposure.

The two “shock test” scenarios assume a sustained parallel 100 and 200 basis point increase in interest rates. As short-term rates have remained low through 2014 and the first quarter of 2015, we do not believe that analysis of an assumed decrease in interest rates would provide meaningful results. We will continue to evaluate these scenarios as interest rates change, until short-term rates rise above 3.0%, at which point we will resume evaluations of shock scenarios in which interest rates decrease.

41

Our interest rate risk exposure model incorporates assumptions regarding the level of interest rate or balance changes on indeterminable maturity deposits (demand deposits, interest-bearing transaction accounts and savings accounts) for a given level of market rate changes. These assumptions have been developed through a combination of historical analysis and future expected pricing behavior. Changes in prepayment behavior of mortgage-backed securities, residential and commercial mortgage loans in each rate environment are captured using industry estimates of prepayment speeds for various coupon segments of the portfolio. The impact of planned growth and new business activities is factored into the simulation model. This modeling indicated interest rate sensitivity as follows (in thousands):

	Anticipated Impact Over the Next Twelve Months as Compared to Most Likely Scenario				Anticipated Impact Over the Next Twelve Months as Compared to Most Likely Scenario
	100 bp Increase		200 bp Increase		100 bp Increase		200 bp Increase
	March 31, 2015				March 31, 2014
Change in net interest income	$	79,855	$	169,010	$	46,328	$	104,645

The simulations used to manage market risk are based on numerous assumptions regarding the effect of changes in interest rates on the timing and extent of repricing characteristics, future cash flows, and customer behavior. These assumptions are inherently uncertain and, as a result, the model cannot precisely estimate net interest income or precisely predict the impact of higher or lower interest rates on net interest income. Actual results may differ from simulated results due to timing, magnitude and frequency of interest rate changes as well as changes in market conditions and management strategies, among other factors.

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ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the supervision and participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act of 1934, as amended) as of the end of the period covered by this report. Based upon that evaluation, we have concluded that, as of the end of such period, our disclosure controls and procedures were effective in recording, processing, summarizing and reporting, on a timely basis, information required to be disclosed by us in the reports that we file or submit under the Exchange Act and were effective in ensuring that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to the Company’s management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We are subject to various claims and legal actions related to operating activities that arise in the ordinary course of business. Management does not currently expect the ultimate disposition of these matters to have a material adverse impact on our financial statements.

ITEM 1A. RISK FACTORS

There have been no material changes in the risk factors previously disclosed in the Company’s 2014 Form 10-K for the fiscal year ended December 31, 2014.

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ITEM 6. EXHIBITS

(a)	Exhibits
	31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
	31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
	32.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
	32.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
	101	The following materials from Texas Capital Bancshares, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Statements of Income, (ii) Consolidated Balance Sheets, (iii) Consolidated Statements of Cash Flows, and (iv) Notes to Consolidated Financial Statements

44

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

TEXAS CAPITAL BANCSHARES, INC.

Date: April 23, 2015

/s/ Peter B. Bartholow

Peter B. Bartholow

Chief Financial Officer

(Duly authorized officer and principal financial officer)

45

EXHIBIT INDEX

Exhibit Number
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Exchange Act, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
32.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
32.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(b) of the Exchange Act and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, furnished herewith.
101	The following materials from Texas Capital Bancshares, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2015, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Statements of Income, (ii) Consolidated Balance Sheets, (iii) Consolidated Statements of Cash Flows, and (iv) Notes to Consolidated Financial Statements

46

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, C. Keith Cargill, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Texas Capital Bancshares, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 23, 2015

/s/ C. Keith Cargill

C. Keith Cargill

Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Peter B. Bartholow, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Texas Capital Bancshares, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal controls over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 23, 2015

/s/ Peter B. Bartholow

Peter B. Bartholow

Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION

In connection with the Quarterly Report on Form 10-Q of Texas Capital Bancshares, Inc. (the “Company”) for the period ending March 31, 2015 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, C. Keith Cargill, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report, fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ C. Keith Cargill

C. Keith Cargill

Chief Executive Officer

Date: April 23, 2015

EX-32.2

EXHIBIT 32.2

CERTIFICATION

In connection with the Quarterly Report on Form 10-Q of Texas Capital Bancshares, Inc. (the “Company”) for the period ending March 31, 2015 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Peter B. Bartholow, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

1 The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2 The information contained in the Report, fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Peter B. Bartholow

Peter B. Bartholow

Chief Financial Officer

Date: April 23, 2015

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DERIVATIVE FINANCIAL INSTRUMENTS

3 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

DERIVATIVE FINANCIAL INSTRUMENTS

The fair value of derivative positions outstanding is included in other assets and other liabilities in the accompanying consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty that are subject to a legally enforceable master netting agreement.

During three months ended March 31, 2015 and 2014, we entered into certain interest rate derivative positions that are not designated as hedging instruments. These derivative positions relate to transactions in which we enter into an interest rate swap, cap and/or floor with a customer while at the same time entering into an offsetting interest rate swap, cap and/or floor with another financial institution. In connection with each swap transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on a similar notional amount at a fixed interest rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate. Because we act as an intermediary for our customer, changes in the fair value of the underlying derivative contracts substantially offset each other and do not have a material impact on our results of operations.

The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2015 and December 31, 2014 are presented in the following tables (in thousands):

	March 31, 2015						December 31, 2014
	Estimated Fair Value						Estimated Fair Value
	Notional Amount		Asset Derivative		Liability Derivative		Notional Amount		Asset Derivative			Liability Derivative
Non-hedging interest rate derivatives:
Financial institution counterparties:
Commercial loan/lease interest rate swaps	$	986,688	$	—	$	41,868	$	866,432	$	361		$	30,162
Commercial loan/lease interest rate caps	158,403		1,878		—		63,414		1,014			—
Customer counterparties:
Commercial loan/lease interest rate swaps	986,688		41,868		—		866,432		30,162			361
Commercial loan/lease interest rate caps	158,403		—		1,878		63,414		—			1,014
Gross derivatives			43,746		43,746				31,537			31,537
Offsetting derivative assets/liabilities			—		—				(361		)	(361		)
Net derivatives included in the consolidated balance sheets			$	43,746	$	43,746			$	31,176		$	31,176

The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2015 were as follows:

	March 31, 2015 Weighted-Average Interest Rate				December 31, 2014 Weighted-Average Interest Rate
	Received		Paid		Received		Paid
Non-hedging interest rate swaps	2.74	%	4.70	%	2.79	%	4.82	%

The weighted-average strike rate for outstanding interest rate caps was 2.14% at March 31, 2015 and 1.44% at December 31, 2014.

Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial. Our credit exposure, net of any collateral pledged, relating to interest rate swaps and caps was approximately $43.7 million at March 31, 2015 and approximately $31.2 million at December 31, 2014, all of which relates to bank customers. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap and cap values. At March 31, 2015 and December 31, 2014, we had $44.0 million and $30.2 million, respectively, in cash collateral pledged for these derivatives included in interest-bearing deposits.

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CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest income
Interest and fees on loans	$ 139,174	$ 115,872
Securities	358	540
Federal funds sold	116	40
Deposits in other banks	1,260	159
Total interest income	140,908	116,611
Interest expense
Deposits	5,628	4,030
Federal funds purchased	68	95
Repurchase agreements	4	4
Other borrowings	390	72
Subordinated notes	4,191	3,479
Trust preferred subordinated debentures	618	616
Total interest expense	10,899	8,296
Net interest income	130,009	108,315
Provision for credit losses	11,000	5,000
Net interest income after provision for credit losses	119,009	103,315
Non-interest income
Service charges on deposit accounts	2,094	1,696
Trust fee income	1,200	1,282
Bank owned life insurance (BOLI) income	484	509
Brokered loan fees	4,232	2,824
Swap fees	1,986	1,224
Other	2,271	2,821
Total non-interest income	12,267	10,356
Non-interest expense
Salaries and employee benefits	45,828	42,056
Net occupancy expense	5,691	4,768
Marketing	4,218	3,759
Legal and professional	4,048	5,402
Communications and technology	5,078	3,924
FDIC insurance assessment	3,790	2,725
Allowance and other carrying costs for OREO	9	45
Other	7,855	6,638
Total non-interest expense	76,517	69,317
Income before income taxes	54,759	44,354
Income tax expense	19,709	16,089
Net income	35,050	28,265
Preferred stock dividends	2,438	2,438
Net income available to common stockholders	32,612	25,827
Other comprehensive income (loss)
Change in net unrealized gain on available-for-sale securities arising during period, before-tax	(76)	(162)
Income tax benefit related to net unrealized gain on available-for-sale securities	(27)	(57)
Other comprehensive loss, net of tax	(49)	(105)
Comprehensive income	$ 35,001	$ 28,160
Basic earnings per common share (usd per share)	$ 0.71	$ 0.61
Diluted earnings per common share (usd per share)	$ 0.70	$ 0.60

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SECURITIES

3 Months Ended

Mar. 31, 2015

Available-for-sale Securities [Abstract]

SECURITIES

SECURITIES

Securities are identified as either held-to-maturity or available-for-sale based upon various factors, including asset/liability management strategies, liquidity and profitability objectives, and regulatory requirements. Held-to-maturity securities are carried at cost, adjusted for amortization of premiums or accretion of discounts. Available-for-sale securities are securities that may be sold prior to maturity based upon asset/liability management decisions. Securities identified as available-for-sale are carried at fair value. Unrealized gains or losses on available-for-sale securities are recorded as accumulated other comprehensive income in stockholders’ equity, net of taxes. Amortization of premiums or accretion of discounts on mortgage-backed securities is periodically adjusted for estimated prepayments. Realized gains and losses and declines in value judged to be other-than-temporary are included in gain (loss) on sale of securities. The cost of securities sold is based on the specific identification method.

At March 31, 2015, our net unrealized gain on the available-for-sale securities portfolio was $1.9 million compared to $2.0 million at December 31, 2014. As a percent of outstanding balances, the unrealized gain was 5.34% and 4.99% at March 31, 2015, and December 31, 2014, respectively. The increase in the unrealized gain percentage at March 31, 2015 is related to the increase in market prices offset by the reduction in the portfolio balance.

The following is a summary of securities (in thousands):

	March 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	26,912	$	2,006	$	—		$	28,918
Municipals	1,308		5		—			1,313
Equity securities(1)	7,522		26		(130		)	7,418
	$	35,742	$	2,037	$	(130	)	$	37,649
	December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	28,957	$	2,108	$	—		$	31,065
Municipals	3,257		10		—			3,267
Equity securities(1)	7,522		16		(151		)	7,387
	$	39,736	$	2,134	$	(151	)	$	41,719

(1) Equity securities consist of Community Reinvestment Act funds.

The amortized cost and estimated fair value of securities are presented below by contractual maturity (in thousands, except percentage data):

	March 31, 2015
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	—		$	7,967		$	5,250		$	13,695		$	26,912
Estimated fair value	—			8,394			5,904			14,620			28,918
Weighted average yield(3)	—			4.79		%	5.54		%	2.36		%	3.73		%
Municipals:(2)
Amortized cost	745			563			—			—			1,308
Estimated fair value	747			566			—			—			1,313
Weighted average yield(3)	5.51		%	5.69		%	—			—			5.59		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,418			—			—			—			7,418
Total available-for-sale securities:
Amortized cost													$	35,742
Estimated fair value													$	37,649

	December 31, 2014
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	1		$	9,151		$	5,661		$	14,144		$	28,957
Estimated fair value	1			9,662			6,333			15,069			31,065
Weighted average yield(3)	6.50		%	4.79		%	5.54		%	2.36		%	3.75		%
Municipals:(2)
Amortized cost	1,669			1,588			—			—			3,257
Estimated fair value	1,674			1,593			—			—			3,267
Weighted average yield(3)	5.78		%	5.79		%	—			—			5.79		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,387			—			—			—			7,387
Total available-for-sale securities:
Amortized cost													$	39,736
Estimated fair value													$	41,719

(1) Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

(2) Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

(3) Yields are calculated based on amortized cost.

(4) These equity securities do not have a stated maturity.

Securities with carrying values of approximately $28.8 million were pledged to secure certain borrowings and deposits at March 31, 2015. Of the pledged securities at March 31, 2015, approximately $9.4 million were pledged for certain deposits, and approximately $19.4 million were pledged for repurchase agreements.

The following table discloses, as of March 31, 2015 and December 31, 2014, our investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months (in thousands):

March 31, 2015	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,370	$	(130	)	$	6,370	$	(130	)
December 31, 2014	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,349	$	(151	)	$	6,349	$	(151	)

At March 31, 2015, we owned one security with an unrealized loss position. This security is a publicly traded equity fund and is subject to market pricing volatility. We do not believe this unrealized loss is “other than temporary”. We have evaluated the near-term prospects of the investment in relation to the severity and duration of the impairment and based on that evaluation have the ability and intent to hold the investment until recovery of fair value.

Unrealized gains or losses on our available-for-sale securities (after applicable income tax expense or benefit) are included in accumulated other comprehensive income (loss), net. Comprehensive income for the three months ended March 31, 2015 and 2014 included net after-tax losses of $49,000 and $105,000, respectively, due to changes in the net unrealized gains/losses on securities available-for-sale.

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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Tables)

3 Months Ended

Mar. 31, 2015

Risks and Uncertainties [Abstract]

Schedule of financial instruments with off-balance sheet risk

The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands):

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	5,178,514	$	5,324,460
Standby letters of credit	173,198		177,808

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NEW ACCOUNTING PRONOUNCEMENTS

3 Months Ended

Mar. 31, 2015

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

NEW ACCOUNTING PRONOUNCEMENTS

NEW ACCOUNTING PRONOUNCEMENTS

ASU 2014-09 "Revenue from Contracts with Customers (Topic 606)" ("ASU 2014-09") implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 establishes a five-step model which entities must follow to recognize revenue and removes inconsistencies and weaknesses in existing guidance. ASU 2014-09 is effective for annual and interim periods beginning after December 15, 2016 and is not expected to have a significant impact on our consolidated financial statements.

ASU 2014-12 "Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period" ("ASU 2014-12") requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is intended to resolve the diverse accounting treatments of these types of awards in practice and is effective for annual and interim periods beginning after December 15, 2015. It is not expected to have a significant impact on our consolidated financial statements.

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DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Asset Derivative	$ 43,746,000	$ 31,537,000
Liability Derivative	43,746,000	31,537,000
Offsetting derivative liability	0	(361,000)
Offsetting derivative asset	0	(361,000)
Derivative asset, net	43,746,000	31,176,000
Derivative liability, net	43,746,000	31,176,000
Description of credit risk exposure on interest rate swaps and caps	Our credit exposure on interest rate swaps and caps is limited to the net favorable value and interest payments of all swaps and caps by each counterparty. In such cases collateral may be required from the counterparties involved if the net value of the swaps and caps exceeds a nominal amount considered to be immaterial
Credit exposure relating to interest rate swaps and caps	43,700,000	31,200,000
Cash collateral pledge for derivatives	44,000,000	30,200,000
Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease | Weighted-average interest rate received
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	2.74%	2.79%
Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease | Weighted-average interest rate paid
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	4.70%	4.82%
Commercial loan/lease interest rate caps
Derivatives, Fair Value [Line Items]
Weighted-average interest rate received and paid	2.14%	1.44%
Financial institution counterparties: | Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	986,688,000	866,432,000
Asset Derivative	0	361,000
Liability Derivative	41,868,000	30,162,000
Financial institution counterparties: | Commercial loan/lease interest rate caps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	158,403,000	63,414,000
Asset Derivative	1,878,000	1,014,000
Liability Derivative	0	0
Customer counterparties: | Commercial loan/lease interest rate swaps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	986,688,000	866,432,000
Asset Derivative	41,868,000	30,162,000
Liability Derivative	0	361,000
Customer counterparties: | Commercial loan/lease interest rate caps | Non-hedging interest rate derivatives/swaps | Commercial loan/lease
Derivatives, Fair Value [Line Items]
Notional Amount	158,403,000	63,414,000
Asset Derivative	0	0
Liability Derivative	$ 1,878,000	$ 1,014,000

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Commercial | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment			$ 0
With no related allowance recorded:
Financing Receivable, Impaired [Line Items]
Recorded investment	40,300		16,864
Unpaid principal balance	44,461		19,113
Related allowance	0		0
Average recorded investment	24,676		19,802
Interest income recognized	10		25
With no related allowance recorded: | Commercial | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	31,214		9,608
Unpaid principal balance	35,375		11,857
Related allowance	0		0
Average recorded investment	16,810		7,334
Interest income recognized	0		0
With no related allowance recorded: | Commercial | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	1,266
Unpaid principal balance	1,266		0
Related allowance	0		0
Average recorded investment	422		375
Interest income recognized	10		25
With no related allowance recorded: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		118
Interest income recognized	0		0
With no related allowance recorded: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	3,688		3,735
Unpaid principal balance	3,688		3,735
Related allowance	0		0
Average recorded investment	3,719		7,970
Interest income recognized	0		0
With no related allowance recorded: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	4,132		3,521
Unpaid principal balance	4,132		3,521
Related allowance	0		0
Average recorded investment	3,725		2,795
Interest income recognized	0		0
With no related allowance recorded: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		1,210
Interest income recognized	0		0
With no related allowance recorded: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With no related allowance recorded: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With an allowance recorded:
Financing Receivable, Impaired [Line Items]
Recorded investment	33,015		32,416
Unpaid principal balance	33,015		33,416
Related allowance	11,232		8,376
Average recorded investment	32,616		26,641
Interest income recognized	0		0
With an allowance recorded: | Commercial | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	28,117		24,553
Unpaid principal balance	28,117		25,553
Related allowance	10,860		7,433
Average recorded investment	25,741		17,705
Interest income recognized	0		0
With an allowance recorded: | Commercial | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	636		1,004
Unpaid principal balance	636		1,004
Related allowance	98		272
Average recorded investment	881		991
Interest income recognized	0		0
With an allowance recorded: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		0
Interest income recognized	0		0
With an allowance recorded: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	1,944		4,203
Unpaid principal balance	1,944		4,203
Related allowance	46		317
Average recorded investment	3,451		5,064
Interest income recognized	0		0
With an allowance recorded: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	436		526
Unpaid principal balance	436		526
Related allowance	65		79
Average recorded investment	496		705
Interest income recognized	0		0
With an allowance recorded: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	1,710		1,895
Unpaid principal balance	1,710		1,895
Related allowance	137		240
Average recorded investment	1,833		2,119
Interest income recognized	0		0
With an allowance recorded: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		62
Unpaid principal balance	0		62
Related allowance	0		9
Average recorded investment	41		16
Interest income recognized	0		0
With an allowance recorded: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	172		173
Unpaid principal balance	172		173
Related allowance	26		26
Average recorded investment	173		41
Interest income recognized	0		0
Combined:
Financing Receivable, Impaired [Line Items]
Recorded investment	73,315		49,280
Unpaid principal balance	77,476		52,529
Related allowance	11,232		8,376
Average recorded investment	57,292	43,400	46,443
Interest income recognized	10		25
Combined: | Commercial | Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment	59,331		34,161
Unpaid principal balance	63,492		37,410
Related allowance	10,860		7,433
Average recorded investment	42,551		25,039
Interest income recognized	0		0
Combined: | Commercial | Energy
Financing Receivable, Impaired [Line Items]
Recorded investment	1,902		1,004
Unpaid principal balance	1,902		1,004
Related allowance	98		272
Average recorded investment	1,303		1,366
Interest income recognized	10		25
Combined: | Construction | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0		0
Average recorded investment	0		118
Interest income recognized	0		0
Combined: | Real estate | Market risk
Financing Receivable, Impaired [Line Items]
Recorded investment	5,632		7,938
Unpaid principal balance	5,632		7,938
Related allowance	46		317
Average recorded investment	7,170		13,034
Interest income recognized	0		0
Combined: | Real estate | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment	4,568		4,047
Unpaid principal balance	4,568		4,047
Related allowance	65		79
Average recorded investment	4,221		3,500
Interest income recognized	0		0
Combined: | Real estate | Secured by 1-4 family
Financing Receivable, Impaired [Line Items]
Recorded investment	1,710		1,895
Unpaid principal balance	1,710		1,895
Related allowance	137		240
Average recorded investment	1,833		3,329
Interest income recognized	0		0
Combined: | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	0		62
Unpaid principal balance	0		62
Related allowance	0		9
Average recorded investment	41		16
Interest income recognized	0		0
Combined: | Leases
Financing Receivable, Impaired [Line Items]
Recorded investment	172		173
Unpaid principal balance	172		173
Related allowance	26		26
Average recorded investment	173		41
Interest income recognized	$ 0		$ 0

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FAIR VALUE DISCLOSURES (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value

Assets and liabilities measured at fair value at March 31, 2015 and December 31, 2014 are as follows (in thousands):

	Fair Value Measurements Using
March 31, 2015	Level 1		Level 2		Level 3
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	28,918	$	—
Municipals	—		1,313		—
Equity securities(2)	—		7,418		—
Loans(3) (5)	—		—		23,210
OREO(4) (5)	—		—		605
Derivative assets(6)	—		43,746		—
Derivative liabilities(6)	—		43,746		—
December 31, 2014
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	31,065	$	—
Municipals	—		3,267		—
Equity securities(2)	—		7,387		—
Loans(3) (5)	—		—		23,536
OREO(4) (5)	—		—		568
Derivative assets(6)	—		31,176		—
Derivative liabilities(6)	—		31,176		—

(1) Securities are measured at fair value on a recurring basis, generally monthly.

(2) Equity securities consist of Community Reinvestment Act funds.

(3) Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

(4) OREO is transferred from loans to OREO at fair value less selling costs.

(5) Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

(6) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.

Summary of the carrying amounts and estimated fair values of financial instruments

A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands):

	March 31, 2015				December 31, 2014
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	834,547	$	834,547	$	1,330,514	$	1,330,514
Securities, available-for-sale	37,649		37,649		41,719		41,719
Loans held for investment, net	16,061,650		16,067,528		14,156,058		14,161,484
Derivative assets	43,746		43,746		31,176		31,176
Deposits	14,122,306		14,122,653		12,673,300		12,673,607
Federal funds purchased	88,384		88,384		66,971		66,971
Customer repurchase agreements	37,074		37,074		25,705		25,705
Other borrowings	1,000,000		1,000,000		1,100,005		1,100,005
Subordinated notes	286,000		292,521		286,000		289,947
Trust preferred subordinated debentures	113,406		113,406		113,406		113,406
Derivative liabilities	43,746		43,746		31,176		31,176

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STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2015

Compensation Related Costs [Abstract]

Schedule of stock-based compensation costs

Stock-based compensation consists of SARs and RSUs granted from 2009 through March 31, 2015.

	Three months ended March 31,
(in thousands)	2015		2014
Stock- based compensation expense recognized:
SARs	$	104	$	143
RSUs	887		1,119
Total compensation expense recognized	$	991	$	1,262

In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units. A summary of the compensation cost for these units is as follows (in thousands):

	Three months ended March 31,
	2015		2014
Cash-based performance units	$	1,366	$	3,393

Schedule of unrecognized compensation costs

	March 31, 2015
(in thousands)	Options		SARs and RSUs
Unrecognized compensation expense related to unvested awards	$	—	$	11,804
Weighted average period over which expense is expected to be recognized, in years	N/A		3.5

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FAIR VALUE DISCLOSURES (Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	$ 37,649		$ 41,719
OREO	605	[1],[2]	568	[1],[2]	2,420	5,110
Derivative assets	43,746		31,176
Derivative liabilities	(43,746)		(31,176)
Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	28,918	[3]	31,065	[3]
Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	1,313	[4]	3,267	[4]
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	7,418	[5],[6]	7,387	[5],[6]
Fair value measurements, recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	[7]	0	[7]
Derivative liabilities	0	[7]	0	[7]
Fair value measurements, recurring basis | Level 1 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[8]	0	[8]
Fair value measurements, recurring basis | Level 1 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[8]	0	[8]
Fair value measurements, recurring basis | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[5],[8]	0	[5],[8]
Fair value measurements, recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	43,746	[7]	31,176	[7]
Derivative liabilities	(43,746)	[7]	(31,176)	[7]
Fair value measurements, recurring basis | Level 2 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	28,918	[8]	31,065	[8]
Fair value measurements, recurring basis | Level 2 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	1,313	[8]	3,267	[8]
Fair value measurements, recurring basis | Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	7,418	[5],[8]	7,387	[5],[8]
Fair value measurements, recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	[7]	0	[7]
Derivative liabilities	0	[7]	0	[7]
Fair value measurements, recurring basis | Level 3 | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[8]	0	[8]
Fair value measurements, recurring basis | Level 3 | Municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[8]	0	[8]
Fair value measurements, recurring basis | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities, available-for-sale	0	[5],[8]	0	[5],[8]
Fair value measurements, nonrecurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	[1],[9]	0	[1],[9]
OREO	0	[1],[2]	0	[1],[2]
Fair value measurements, nonrecurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	[1],[9]	0	[1],[9]
OREO	0	[1],[2]	0	[1],[2]
Fair value measurements, nonrecurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	23,210	[1],[9]	23,536	[1],[9]
OREO	$ 605	[1],[2]	$ 568	[1],[2]

[1] Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

[2] OREO is transferred from loans to OREO at fair value less selling costs.

[3] Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

[4] Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

[5] Equity securities consist of Community Reinvestment Act funds.

[6] These equity securities do not have a stated maturity.

[7] Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.

[8] Securities are measured at fair value on a recurring basis, generally monthly.

[9] Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

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LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Risk Profile (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loan commitments rated substandard or worse that are reviewed for loss potential	$ 500,000
Commercial	6,188,958,000	5,869,219,000
Mortgage finance	5,408,750,000	4,102,125,000
Construction	1,559,545,000	1,416,405,000
Real estate	2,957,786,000	2,807,127,000
Consumer	17,868,000	19,699,000
Leases	93,051,000	99,495,000
Gross loans held for investment	16,225,958,000	14,314,070,000	11,670,594,000
Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial	5,933,412,000	5,738,474,000
Mortgage finance	5,408,750,000	4,102,125,000
Construction	1,557,507,000	1,414,671,000
Real estate	2,939,032,000	2,785,804,000
Consumer	17,640,000	19,579,000
Leases	85,253,000	91,044,000
Gross loans held for investment	15,941,594,000	14,151,697,000
Special mention
Financing Receivable, Recorded Investment [Line Items]
Commercial	139,110,000	53,839,000
Mortgage finance	0	0
Construction	0	1,734,000
Real estate	7,153,000	8,723,000
Consumer	9,000	11,000
Leases	4,065,000	4,363,000
Gross loans held for investment	150,337,000	68,670,000
Substandard-accruing
Financing Receivable, Recorded Investment [Line Items]
Commercial	57,283,000	43,784,000
Mortgage finance	0	0
Construction	2,038,000	0
Real estate	2,619,000	2,653,000
Consumer	219,000	47,000
Leases	3,561,000	3,915,000
Gross loans held for investment	65,720,000	50,399,000
Non-accrual
Financing Receivable, Recorded Investment [Line Items]
Commercial	59,153,000	33,122,000
Mortgage finance	0	0
Construction	0	0
Real estate	8,982,000	9,947,000
Consumer	0	62,000
Leases	172,000	173,000
Gross loans held for investment	$ 68,307,000	$ 43,304,000

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 7) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Loans considered restructured that are not already on non-accrual	$ 319,000		$ 1,800,000
Non-accrual loans that met the criteria for restructured unfunded commitments	12,700,000		12,100,000
Number of restructured loans	2	1
Pre-restructuring outstanding recorded investment	1,369,000	1,441,000
Post-restructuring outstanding recorded investment	1,369,000	1,441,000
Commercial
Financing Receivable, Modifications [Line Items]
Number of restructured loans	2
Pre-restructuring outstanding recorded investment	1,369,000
Post-restructuring outstanding recorded investment	1,369,000
Real estate
Financing Receivable, Modifications [Line Items]
Number of restructured loans		1
Pre-restructuring outstanding recorded investment		1,441,000
Post-restructuring outstanding recorded investment		$ 1,441,000

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SECURITIES (Details 1) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Total	$ 35,742,000		$ 39,736,000
Estimated Fair Value	37,649,000		41,719,000
Available-for-sale Securities, Other Disclosure Items
Federal tax rate	35.00%		35.00%
Available-for-sale securities pledged as collateral	28,800,000
Residential mortgage-backed securities
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	0	[1]	1,000	[1]
Amortized cost, After One Through Five Years	7,967,000	[1]	9,151,000	[1]
Amortized cost, After Five Through Ten Years	5,250,000	[1]	5,661,000	[1]
Amortized cost, After Ten Years	13,695,000	[1]	14,144,000	[1]
Amortized cost, Total	26,912,000	[1]	28,957,000	[1]
Estimated fair value, Less Than One Year	0	[1]	1,000	[1]
Estimated fair value, After One Through Five Years	8,394,000	[1]	9,662,000	[1]
Estimated fair value, After Five Through Ten Years	5,904,000	[1]	6,333,000	[1]
Estimated fair value, After Ten Years	14,620,000	[1]	15,069,000	[1]
Estimated Fair Value	28,918,000	[1]	31,065,000	[1]
Weighted average yield, Less Than One Year	0.00%	[1],[2]	6.50%	[1],[2]
Weighted average yield, After One Through Five Years	4.79%	[1],[2]	4.79%	[1],[2]
Weighted average yield, After Five Through Ten Years	5.54%	[1],[2]	5.54%	[1],[2]
Weighted average yield, After Ten Years	2.36%	[1],[2]	2.36%	[1],[2]
Weighted average yield, Total	3.73%	[1],[2]	3.75%	[1],[2]
Municipals
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	745,000	[3]	1,669,000	[3]
Amortized cost, After One Through Five Years	563,000	[3]	1,588,000	[3]
Amortized cost, After Five Through Ten Years	0	[3]	0	[3]
Amortized cost, After Ten Years	0	[3]	0	[3]
Amortized cost, Total	1,308,000	[3]	3,257,000	[3]
Estimated fair value, Less Than One Year	747,000	[3]	1,674,000	[3]
Estimated fair value, After One Through Five Years	566,000	[3]	1,593,000	[3]
Estimated fair value, After Five Through Ten Years	0	[3]	0	[3]
Estimated fair value, After Ten Years	0	[3]	0	[3]
Estimated Fair Value	1,313,000	[3]	3,267,000	[3]
Weighted average yield, Less Than One Year	5.51%	[2],[3]	5.78%	[2],[3]
Weighted average yield, After One Through Five Years	5.69%	[2],[3]	5.79%	[2],[3]
Weighted average yield, After Five Through Ten Years	0.00%	[2],[3]	0.00%	[2],[3]
Weighted average yield, After Ten Years	0.00%	[2],[3]	0.00%	[2],[3]
Weighted average yield, Total	5.59%	[2],[3]	5.79%	[2],[3]
Equity securities
The amortized cost and fair value of available-for-sale securites by maturity
Amortized cost, Less Than One Year	7,522,000	[4]	7,522,000	[4]
Amortized cost, After One Through Five Years	0	[4]	0	[4]
Amortized cost, After Five Through Ten Years	0	[4]	0	[4]
Amortized cost, After Ten Years	0	[4]	0	[4]
Amortized cost, Total	7,522,000	[4],[5]	7,522,000	[4],[5]
Estimated fair value, Less Than One Year	7,418,000	[4]	7,387,000	[4]
Estimated fair value, After One Through Five Years	0	[4]	0	[4]
Estimated fair value, After Five Through Ten Years	0	[4]	0	[4]
Estimated fair value, After Ten Years	0	[4]	0	[4]
Estimated Fair Value	7,418,000	[4],[5]	7,387,000	[4],[5]
Deposits
Available-for-sale Securities, Other Disclosure Items
Available-for-sale securities pledged as collateral	9,400,000
Repurchase agreements
Available-for-sale Securities, Other Disclosure Items
Available-for-sale securities pledged as collateral	$ 19,400,000

[1] Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

[2] Yields are calculated based on amortized cost.

[3] Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

[4] These equity securities do not have a stated maturity.

[5] Equity securities consist of Community Reinvestment Act funds.

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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments whose contract amounts represented credit risk	$ 5,178,514	$ 5,324,460
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments whose contract amounts represented credit risk	$ 173,198	$ 177,808

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REGULATORY MATTERS (Tables)

3 Months Ended

Mar. 31, 2015

Regulatory Capital Requirements [Abstract]

Schedule of capital ratios

The table below summarizes our capital ratios:

	March 31, 2015		December 31, 2014
Company
Risk-based capital:
CET1(1)	7.18	%	7.89	%
Tier 1 capital	8.57	%	9.46	%
Total capital	10.71	%	11.83	%
Leverage	9.53	%	10.76	%

(1) December 31, 2014 ratio is unaudited.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Stockholders' Equity [Abstract]
Income tax benefit (expense) related to net unrealized gain on available-for-sale securities	$ 27	$ 57

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OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Operations and summary of significant accounting policies

OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization and Nature of Business

Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.

Basis of Presentation

Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.

The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2014, included in our Annual Report on Form 10-K filed with the SEC on February 19, 2015 (the “2014 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.

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LOANS AND ALLOWANCE FOR LOAN LOSSES

3 Months Ended

Mar. 31, 2015

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

Loans and allowance for credit losses

LOANS AND ALLOWANCE FOR LOAN LOSSES

At March 31, 2015 and December 31, 2014, loans were as follows (in thousands):

	March 31, 2015			December 31, 2014
Commercial	$	6,188,958		$	5,869,219
Mortgage finance	5,408,750			4,102,125
Construction	1,559,545			1,416,405
Real estate	2,957,786			2,807,127
Consumer	17,868			19,699
Leases	93,051			99,495
Gross loans held for investment	16,225,958			14,314,070
Deferred income (net of direct origination costs)	(56,230		)	(57,058		)
Allowance for loan losses	(108,078		)	(100,954		)
Total	$	16,061,650		$	14,156,058

Commercial Loans and Leases. Our commercial loan and lease portfolio is comprised of lines of credit for working capital and term loans and leases to finance equipment and other business assets. Our energy production loans are generally collateralized with proven reserves based on appropriate valuation standards and take into account the risk of oil and gas price volatility. Our commercial loans and leases are underwritten after carefully evaluating and understanding the borrower’s ability to operate profitably. Our underwriting standards are designed to promote relationship banking rather than to make loans on a transactional basis. Our lines of credit typically are limited to a percentage of the value of the assets securing the line. Lines of credit and term loans typically are reviewed annually and are supported by accounts receivable, inventory, equipment and other assets of our clients’ businesses.

Mortgage Finance Loans. Our mortgage finance loans consist of ownership interests purchased in single-family residential mortgages funded through our mortgage finance group. These interests are typically on our balance sheet for 10 to 20 days. We have agreements with mortgage lenders and purchase interests in individual loans they originate. All loans are underwritten consistent with established programs for permanent financing with financially sound investors. Substantially all loans are conforming loans. Balances as of March 31, 2015 and December 31, 2014 are stated net of $429.8 million and $358.3 million participations sold, respectively.

Construction Loans. Our construction loan portfolio consists primarily of single- and multi-family residential properties and commercial projects used in manufacturing, warehousing, service or retail businesses. Our construction loans generally have terms of one to three years. We typically make construction loans to developers, builders and contractors that have an established record of successful project completion and loan repayment and have a substantial equity investment in the borrowers. Loan amounts are derived primarily from the bank's evaluation of expected cash flows available to service debt from stabilized projects under hypothetically stressed conditions. Construction loans are also based in part upon estimates of costs and value associated with the completed project. Sources of repayment for these types of loans may be pre-committed permanent loans from other lenders, sales of developed property or an interim loan commitment from us until permanent financing is obtained. The nature of these loans makes ultimate repayment sensitive to overall economic conditions. Borrowers may not be able to correct conditions of default in loans, increasing risk of exposure to classification, non-performing status, reserve allocation and actual credit loss and foreclosure. These loans typically have floating rates and commitment fees.

Real Estate Loans. A portion of our real estate loan portfolio is comprised of loans secured by properties other than market risk or investment-type real estate. Market risk loans are real estate loans where the primary source of repayment is expected to come from the sale, permanent financing or lease of the real property collateral. We generally provide temporary financing for commercial and residential property. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Our real estate loans generally have maximum terms of five to seven years, and we provide loans with both floating and fixed rates. We generally avoid long-term loans for commercial real estate held for investment. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Appraised values may be highly variable due to market conditions and the impact of the inability of potential purchasers and lessees to obtain financing and a lack of transactions at comparable values.

At March 31, 2015 and December 31, 2014, we had a blanket floating lien on certain real estate-secured loans, mortgage finance loans and certain securities used as collateral for Federal Home Loan Bank (“FHLB”) borrowings.

Portfolio Geographic Concentration

As of March 31, 2015, a substantial majority of our loans held for investment, excluding our mortgage finance loans and other national lines of business, were to businesses with headquarters and operations in Texas. This geographic concentration subjects the loan portfolio to the general economic conditions within this area. Additionally, we may make loans to these businesses and individuals secured by assets located outside of Texas. The risks created by this concentration have been considered by management in the determination of the appropriateness of the allowance for loan losses. Management believes the allowance for loan losses is appropriate to cover probable losses inherent in the loan portfolio at each balance sheet date.

Summary of Loan Loss Experience

The reserve for loan losses is comprised of specific reserves for impaired loans and an estimate of losses inherent in the portfolio at the balance sheet date, but not yet identified with specified loans. We regularly evaluate our reserve for loan losses to maintain an appropriate level to absorb estimated loan losses inherent in the loan portfolio. Factors contributing to the determination of reserves include the credit-worthiness of the borrower, changes in the value of pledged collateral and general economic conditions. All loan commitments rated substandard or worse and greater than $500,000 are specifically reviewed for loss potential. For loans deemed to be impaired, a specific allocation is assigned based on the losses expected to be realized from those loans. For purposes of determining the general reserve, the portfolio is segregated by product types to recognize differing risk profiles among categories, and then further segregated by credit grades. Credit grades are assigned to all loans. Each credit grade is assigned a risk factor, or reserve allocation percentage. These risk factors are multiplied by the outstanding principal balance and risk-weighted by product type to calculate the required reserve. A similar process is employed to calculate a reserve assigned to off-balance sheet commitments, specifically unfunded loan commitments and letters of credit, and any needed reserve is recorded in other liabilities. Even though portions of the allowance may be allocated to specific loans, the entire allowance is available for any credit that, in management’s judgment, should be charged off.

We have several pass credit grades that are assigned to loans based on varying levels of risk, ranging from credits that are secured by cash or marketable securities, to watch credits which have all the characteristics of an acceptable credit risk but warrant more than the normal level of monitoring. Within our criticized/classified credit grades are special mention, substandard and doubtful. Special mention loans are those that are currently protected by the current sound worth and paying capacity of the borrower, but that are potentially weak and constitute an additional credit risk. The loan has the potential to deteriorate to a substandard grade due to the existence of financial or administrative deficiencies. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. Some substandard loans are insufficiently protected by the current sound worth and paying capacity of the borrower and of the collateral pledged and may be considered impaired. Substandard loans can be accruing or can be on non-accrual depending on the circumstances of the individual loans. Loans classified as doubtful have all the weaknesses inherent in substandard loans with the added characteristics that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high. All doubtful loans are on non-accrual.

The reserve allocation percentages assigned to each credit grade have been developed based primarily on an analysis of our historical loss rates. The allocations are adjusted for certain qualitative factors for such things as general economic conditions and changes in credit policies and lending standards. Changes in the trend and severity of problem loans can cause the estimation of losses to differ from past experience. In addition, the reserve reflects the results of reviews performed by independent third party reviewers as reflected in their confirmations of assigned credit grades within the portfolio. The portion of the allowance that is not derived by the allowance allocation percentages compensates for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. Examples of risks that support the Bank's maintaining an unallocated reserve include the possibility of precipitous negative changes in economic conditions and borrowers' submission of financial statements or certifications of collateral value that subsequently prove to be materially inaccurate for reason of either misstatement or omission of critical information. These situations, while not common, do not necessarily correlate well with the general risk profile presented by assigned credit grade and product type categories. We evaluate many factors and conditions in determining the unallocated portion of the allowance, including amount and frequency of losses attributable to issues not specifically addressed or included in the determination and application of the allowance allocation percentages. The allowance is considered appropriate, given management’s assessment of probable losses within the portfolio as of the evaluation date, the significant growth in the loan and lease portfolio, current economic conditions in the Company’s market areas and other factors.

The methodology used in the periodic review of reserve appropriateness, which is performed at least quarterly, is designed to be dynamic and responsive to changes in portfolio credit quality. The changes are reflected in the general reserve and in specific reserves as the collectability of larger classified loans is evaluated with new information. As our portfolio has matured, historical loss ratios have been closely monitored, and our reserve appropriateness relies primarily on our loss history. The review of the reserve appropriateness is performed by executive management and presented to a committee of our board of directors for their review. The committee reports to the board as part of the board’s review on a quarterly basis of the Company’s consolidated financial statements.

The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,933,412	$	5,408,750	$	1,557,507	$	2,939,032	$	17,640	$	85,253	$	15,941,594
Special mention	139,110		—		—		7,153		9		4,065		150,337
Substandard-accruing	57,283		—		2,038		2,619		219		3,561		65,720
Non-accrual	59,153		—		—		8,982		—		172		68,307
Total loans held for investment	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,738,474	$	4,102,125	$	1,414,671	$	2,785,804	$	19,579	$	91,044	$	14,151,697
Special mention	53,839		—		1,734		8,723		11		4,363		68,670
Substandard-accruing	43,784		—		—		2,653		47		3,915		50,399
Non-accrual	33,122		—		—		9,947		62		173		43,304
Total loans held for investment	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070

The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2015 and March 31, 2014. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2015
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	70,654	$	—	$	7,935		$	15,582		$	240	$	1,141		$	5,402		$	100,954
Provision for loan losses	23,375		—		(3,472		)	(5,601		)	149		(138		)	(4,068		)	10,245
Charge-offs	3,102		—		—			346			62		—			—			3,510
Recoveries	286		—		83			8			4		8			—			389
Net charge-offs (recoveries)	2,816		—		(83		)	338			58		(8		)	—			3,121
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
Period end amount allocated to:
Loans individually evaluated for impairment	$	10,958	$	—	$	—		$	248		$	—	$	26		$	—		$	11,232
Loans collectively evaluated for impairment	80,255		—		4,546			9,395			331		985			1,334			96,846
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
March 31, 2014
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	39,868	$	—	$	14,553		$	24,210		$	149	$	3,105		$	5,719		$	87,604
Provision for loan losses	6,245		—		583			(495		)	56		(575		)	(1,104		)	4,710
Charge-offs	2,336		—		—			—			61		50			—			2,447
Recoveries	210		—		—			8			25		124			—			367
Net charge-offs (recoveries)	2,126		—		—			(8		)	36		(74		)	—			2,080
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234
Period end amount allocated to:
Loans individually evaluated for impairment	$	6,029	$	—	$	—		$	993		$	1	$	6		$	—		$	7,029
Loans collectively evaluated for impairment	37,958		—		15,136			22,730			168		2,598			4,615			83,205
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234

Our recorded investment in loans as of March 31, 2015, December 31, 2014 and March 31, 2014 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of our impairment methodology was as follows (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	61,233	$	—	$	—	$	11,910	$	—	$	172	$	73,315
Loans collectively evaluated for impairment	6,127,725		5,408,750		1,559,545		2,945,876		17,868		92,879		16,152,643
Total	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	35,165	$	—	$	—	$	13,880	$	62	$	173	$	49,280
Loans collectively evaluated for impairment	5,834,054		4,102,125		1,416,405		2,793,247		19,637		99,322		14,264,790
Total	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070
March 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	29,023	$	—	$	—	$	21,112	$	8	$	42	$	50,185
Loans collectively evaluated for impairment	5,176,492		2,688,044		1,437,609		2,208,237		14,807		95,220		11,620,409
Total	$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594

We have traditionally maintained an unallocated reserve component to compensate for the uncertainty and complexity in estimating loan and lease losses including factors and conditions that may not be fully reflected in the determination and application of the allowance allocation percentages. We believe the level of unallocated reserves at March 31, 2015 is warranted due to the continued uncertain economic environment which has produced losses, including those resulting from borrowers' misstatement of financial information or inaccurate certification of collateral values. Such losses are not necessarily correlated with historical loss trends or general economic conditions. Our methodology used to calculate the allowance considers historical losses; however, the historical loss rates for specific product types or credit risk grades may not fully incorporate the effects of continued weakness in the economy.

Generally we place loans on non-accrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. When a loan is placed on non-accrual status, all previously accrued and unpaid interest is reversed. Interest income is subsequently recognized on a cash basis as long as the remaining unpaid principal amount of the loan is deemed to be fully collectible. If collectability is questionable, then cash payments are applied to principal. As of March 31, 2015, $964,000 of our non-accrual loans were earning on a cash basis compared to $310,000 at December 31, 2014. A loan is placed back on accrual status when both principal and interest are current and it is probable that we will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement.

A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. In accordance with ASC 310 Receivables ("ASC 310"), we have also included all restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class, as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	31,214	$	35,375	$	—	$	16,810	$	—
Energy	1,266		1,266		—		422		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	3,688		3,688		—		3,719		—
Commercial	4,132		4,132		—		3,725		—
Secured by 1-4 family	—		—		—		—		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	40,300	$	44,461	$	—	$	24,676	$	10
With an allowance recorded:
Commercial
Business loans	$	28,117	$	28,117	$	10,860	$	25,741	$	—
Energy	636		636		98		881		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	1,944		1,944		46		3,451		—
Commercial	436		436		65		496		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans with an allowance recorded	$	33,015	$	33,015	$	11,232	$	32,616	$	—
Combined:
Commercial
Business loans	$	59,331	$	63,492	$	10,860	$	42,551	$	—
Energy	1,902		1,902		98		1,303		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	5,632		5,632		46		7,170		—
Commercial	4,568		4,568		65		4,221		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans	$	73,315	$	77,476	$	11,232	$	57,292	$	10

December 31, 2014
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	9,608	$	11,857	$	—	$	7,334	$	—
Energy	—		—		—		375		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	3,735		3,735		—		7,970		—
Commercial	3,521		3,521		—		2,795		—
Secured by 1-4 family	—		—		—		1,210		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	16,864	$	19,113	$	—	$	19,802	$	25
With an allowance recorded:
Commercial
Business loans	$	24,553	$	25,553	$	7,433	$	17,705	$	—
Energy	1,004		1,004		272		991		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	4,203		4,203		317		5,064		—
Commercial	526		526		79		705		—
Secured by 1-4 family	1,895		1,895		240		2,119		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans with an allowance recorded	$	32,416	$	33,416	$	8,376	$	26,641	$	—
Combined:
Commercial
Business loans	$	34,161	$	37,410	$	7,433	$	25,039	$	—
Energy	1,004		1,004		272		1,366		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	7,938		7,938		317		13,034		—
Commercial	4,047		4,047		79		3,500		—
Secured by 1-4 family	1,895		1,895		240		3,329		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans	$	49,280	$	52,529	$	8,376	$	46,443	$	25

Average impaired loans outstanding during the three months ended March 31, 2015 and 2014 totaled $57.3 million and $43.4 million, respectively.

The table below provides an age analysis of our past due loans that are still accruing and non-accrual loans, by portfolio class, as of March 31, 2015 (in thousands):

	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days and Accruing(1)		Total Past Due		Non-accrual		Current		Total
Commercial
Business loans	$	17,210	$	2,591	$	2,846	$	22,647	$	57,251	$	4,970,584	$	5,050,482
Energy	—		—		—		—		1,902		1,136,574		1,138,476
Mortgage finance loans	—		—		—		—		—		5,408,750		5,408,750
Construction
Market risk	2,845		—		—		2,845		—		1,540,220		1,543,065
Secured by 1-4 family	—		—		—		—		—		16,480		16,480
Real estate
Market risk	5,222		—		125		5,347		3,827		2,282,609		2,291,783
Commercial	—		—		—		—		4,568		568,745		573,313
Secured by 1-4 family	407		—		—		407		587		91,696		92,690
Consumer	422		43		—		465		—		17,403		17,868
Leases	3,118		—		—		3,118		172		89,761		93,051
Total loans held for investment	$	29,224	$	2,634	$	2,971	$	34,829	$	68,307	$	16,122,822	$	16,225,958

(1) Loans past due 90 days and still accruing includes premium finance loans of $2.8 million. These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

Restructured loans are loans on which, due to the borrower’s financial difficulties, we have granted a concession that we would not otherwise consider for borrowers of similar credit quality. This may include a transfer of real estate or other assets from the borrower, a modification of loan terms, or a combination of the two. Modifications of terms that could potentially qualify as a restructuring include reduction of contractual interest rate, extension of the maturity date at a contractual interest rate lower than the current rate for new debt with similar risk, a reduction of the face amount of debt or forgiveness of either principal or accrued interest. As of March 31, 2015 and December 31, 2014, we had $319,000 and $1.8 million, respectively, in loans considered restructured that are not on non-accrual. These loans did not have unfunded commitments at March 31, 2015 or December 31, 2014. Of the non-accrual loans at March 31, 2015 and December 31, 2014, $12.7 million and $12.1 million, respectively, met the criteria for restructured. These loans had no unfunded commitments at their respective balance sheet dates. A loan continues to qualify as restructured until a consistent payment history or change in borrower’s financial condition has been evidenced, generally no less than twelve months. Assuming that the restructuring agreement specifies an interest rate at the time of the restructuring that is greater than or equal to the rate that we are willing to accept for a new extension of credit with comparable risk, then the loan no longer has to be considered a restructuring if it is in compliance with modified terms in calendar years after the year of the restructure.

The following tables summarize, for the three months ended March 31, 2015 and 2014, loans that were restructured during 2015 and 2014 (in thousands):

March 31, 2015
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Commercial business loans	2	$	1,369	$	1,369
Total new restructured loans in 2015	2	$	1,369	$	1,369
March 31, 2014
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Real estate—commercial	1	$	1,441	$	1,441
Total new restructured loans in 2014	1	$	1,441	$	1,441

The restructured loans generally include terms to temporarily place loans on interest only, extend the payment terms or reduce the interest rate. We did not forgive any principal on the above loans. The restructuring of the loans did not have a significant impact on our allowance for loan losses at March 31, 2015 or 2014.

The following table provides information on how restructured loans were modified during the three months ended March 31, 2015 and 2014 (in thousands):

	Three months ended March 31,
	2015		2014
Extended maturity	$	—	$	1,441
Combination of maturity extension and payment schedule adjustment	1,369		—
Total	$	1,369	$	1,441

As of March 31, 2015 and 2014, we did not have any loans that were restructured within the last 12 months that subsequently defaulted.

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EARNINGS PER COMMON SHARE

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE

The following table presents the computation of basic and diluted earnings per share (in thousands except per share data):

	Three months ended   March 31,
	2015		2014
Numerator:
Net income	$	35,050	$	28,265
Preferred stock dividends	2,438		2,438
Net income available to common stockholders	$	32,612	25,827
Denominator:
Denominator for basic earnings per share— weighted average shares	45,758,655		42,298,355
Effect of employee stock-based awards(1)	210,736		381,597
Effect of warrants to purchase common stock	398,479		540,009
Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions	46,367,870		43,219,961
Basic earnings per common share	$	0.71	$	0.61
Diluted earnings per common share	$	0.70	$	0.60

(1) Stock options, SARs and RSUs outstanding of 168,300 at March 31, 2015 and 23,000 at March 31, 2014 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

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LOANS AND ALLOWANCE FOR LOAN LOSSES - TDR Summary (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	$ 1,369	$ 1,441
Extended maturity
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	0	1,441
Combination of maturity extension and payment schedule adjustment
Financing Receivable, Modifications [Line Items]
Details of how restructured loans were modified	$ 1,369	$ 0

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DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of notional amounts and estimated fair values of interest rate derivative positions

The notional amounts and estimated fair values of interest rate derivative positions outstanding at March 31, 2015 and December 31, 2014 are presented in the following tables (in thousands):

	March 31, 2015						December 31, 2014
	Estimated Fair Value						Estimated Fair Value
	Notional Amount		Asset Derivative		Liability Derivative		Notional Amount		Asset Derivative			Liability Derivative
Non-hedging interest rate derivatives:
Financial institution counterparties:
Commercial loan/lease interest rate swaps	$	986,688	$	—	$	41,868	$	866,432	$	361		$	30,162
Commercial loan/lease interest rate caps	158,403		1,878		—		63,414		1,014			—
Customer counterparties:
Commercial loan/lease interest rate swaps	986,688		41,868		—		866,432		30,162			361
Commercial loan/lease interest rate caps	158,403		—		1,878		63,414		—			1,014
Gross derivatives			43,746		43,746				31,537			31,537
Offsetting derivative assets/liabilities			—		—				(361		)	(361		)
Net derivatives included in the consolidated balance sheets			$	43,746	$	43,746			$	31,176		$	31,176

Schedule of the weighted-average receive and pay interest rate swaps

The weighted-average receive and pay interest rates for interest rate swaps outstanding at March 31, 2015 were as follows:

	March 31, 2015 Weighted-Average Interest Rate				December 31, 2014 Weighted-Average Interest Rate
	Received		Paid		Received		Paid
Non-hedging interest rate swaps	2.74	%	4.70	%	2.79	%	4.82	%

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SECURITIES (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Available-for-sale Securities, Continuous Unrealized Loss Position
After-tax loss due to changes in net unrealized gains/losses on securities	$ (49)	$ (105)
Equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position
Fair Value, Less Than 12 Months	0		0
Unrealized Loss, Less Than 12 Months	0		0
Fair Value, 12 Months or Longer	6,370		6,349
Unrealized Loss, 12 Months or Longer	(130)		(151)
Fair Value, Total	6,370		6,349
Unrealized Loss, Total	$ (130)		$ (151)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Non-accrual loans earning on a cash basis	$ 964	$ 310

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STOCK-BASED COMPENSATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Restricted stock units, additional disclosures
Compensation expense	$ 991	$ 1,262
Unrecognized compensation expense related to unvested awards	11,804
Weighted average period over which expense is expected to be recognized, in years	3 years 6 months
SARs
Restricted stock units, additional disclosures
Compensation expense	104	143
RSUs
Restricted stock units, additional disclosures
Compensation expense	887	1,119
Cash-based performance units	$ 1,366	$ 3,393

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CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares issued	6,000,000	6,000,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	45,772,662	45,735,424
Treasury Stock, shares	417	457

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REGULATORY MATTERS

3 Months Ended

Mar. 31, 2014

Regulatory Capital Requirements [Abstract]

REGULATORY MATTERS

REGULATORY MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company’s and the Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.

In July 2013, the Federal Reserve published final rules for the adoption of the Basel III regulatory capital framework (the "Basel III Capital Rules"). The Basel III Capital Rules, among other things, (i) introduce a new capital measure called "Common Equity Tier 1" ("CET1"), (ii) specify that Tier 1 capital consist of Common Equity Tier 1 and "Additional Tier 1 Capital" instruments meeting specified requirements, (iii) define Common Equity Tier 1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to Common Equity Tier 1 and not to the other components of capital and (iv) expand the scope of the deductions/adjustments as compared to existing regulations. The Basel III Capital Rules became effective for us on January 1, 2015 with certain transition provisions fully phased in on January 1, 2019.

Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios CET1, Tier 1 and Total capital to risk-weighted assets, and of Tier 1 capital to average assets, each as defined in the regulations. Management believes, as of March 31, 2015, that the Company and the Bank met all capital adequacy requirements to which they are subject.

Financial institutions are categorized as well capitalized or adequately capitalized, based on minimum total risk-based, Tier 1 risk-based, CET1 and Tier 1 leverage ratios. As shown in the table below, the Company’s capital ratios exceeded the regulatory definition of adequately capitalized as of March 31, 2015, and December 31, 2014. Based upon the information in its most recently filed call report, the Bank met the capital ratios necessary to be well capitalized. The regulatory authorities can apply changes in classification of assets and such changes may retroactively subject the Company to changes in capital ratios. Any such changes could result in reducing one or more capital ratios below well-capitalized status. In addition, a change may result in imposition of additional assessments by the FDIC or could result in regulatory actions that could have a material effect on condition and results of operations.

Because our bank had less than $15.0 billion in total consolidated assets as of December 31, 2009, we are allowed to continue to classify our trust preferred securities, all of which were issued prior to May 19, 2010, as Tier 1 capital.

The table below summarizes our capital ratios:

	March 31, 2015		December 31, 2014
Company
Risk-based capital:
CET1(1)	7.18	%	7.89	%
Tier 1 capital	8.57	%	9.46	%
Total capital	10.71	%	11.83	%
Leverage	9.53	%	10.76	%

(1) December 31, 2014 ratio is unaudited.

Our mortgage finance loan volumes can increase significantly at month-end, causing a meaningful difference between ending balance and average balance for any period. At March 31, 2015, our total mortgage finance loans were $5.4 billion compared to the average for the quarter ended March 31, 2015 of $3.7 billion. As CET1, Tier 1 and total capital ratios are calculated using ending risk-weighted assets and our mortgage finance loans are 100% risk-weighted, the quarter-end fluctuation in these balances can significantly impact our reported ratios. Due to the risk profile and liquidity of this asset class, we manage capital allocated to mortgage finance loans based on changing trends in average balances and do not believe that the quarter-end balance is representative of risk characteristics that would justify higher allocations. However, we will continue to monitor our capital allocation to confirm that all capital levels remain above well-capitalized levels.

Dividends that may be paid by subsidiary banks are routinely restricted by various regulatory authorities. The amount that can be paid in any calendar year without prior approval of the Bank’s regulatory agencies cannot exceed the lesser of the net profits (as defined) for that year plus the net profits for the preceding two calendar years, or retained earnings. The Basel III Capital Rules further limit the amount of dividends that may be paid by our bank. No dividends were declared or paid on common stock during the three months ended March 31, 2015 or 2014.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), Net of Taxes
Stockholders' equity, beginning balance at Dec. 31, 2013	$ 1,096,350	$ 150,000	$ 410	$ 448,208	$ 496,112	$ (8)	$ 1,628
Shares, outstanding, beginning balance at Dec. 31, 2013		6,000,000	41,036,787			417
Comprehensive income:
Net income	28,265				28,265
Change in unrealized gain on available-for-sale securities, net of taxes	(105)						(105)
Total comprehensive income	28,160
Tax benefit related to exercise of stock-based awards	955			955
Stock-based compensation expense recognized in earnings	1,262			1,262
Issuance of preferred stock - value	0	0		0
Issuance of preferred stock - shares		0
Preferred stock dividend	(2,438)				(2,438)
Issuance of stock related to stock-based awards - value	706		1	707
Issuance of stock related to stock-based awards - shares			46,660
Issuance of common stock - value	106,548		19	106,529
Issuance of common stock - shares			1,875,000
Issuance of common stock related to warrants - shares			773
Stockholders' equity, ending balance at Mar. 31, 2014	1,230,131	150,000	430	556,247	521,939	(8)	1,523
Shares, outstanding, ending balance at Mar. 31, 2014		6,000,000	42,959,220			417
Stockholders' equity, beginning balance at Dec. 31, 2014	1,484,190	150,000	457	709,738	622,714	(8)	1,289
Shares, outstanding, beginning balance at Dec. 31, 2014		6,000,000	45,735,424			417
Comprehensive income:
Net income	35,050				35,050
Change in unrealized gain on available-for-sale securities, net of taxes	(49)						(49)
Total comprehensive income	35,001
Tax benefit related to exercise of stock-based awards	263			263
Stock-based compensation expense recognized in earnings	991			991
Preferred stock dividend	(2,438)				(2,438)
Issuance of stock related to stock-based awards - value	49		0	49
Issuance of stock related to stock-based awards - shares			37,238
Stockholders' equity, ending balance at Mar. 31, 2015	$ 1,517,958	$ 150,000	$ 457	$ 710,943	$ 655,326	$ (8)	$ 1,240
Shares, outstanding, ending balance at Mar. 31, 2015		6,000,000	45,772,662			417

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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 99,602	$ 96,524
Interest-bearing deposits	734,945	1,233,990
Securities, available-for-sale	37,649	41,719
Loans held for investment, mortgage finance	5,408,750	4,102,125
Loans held for investment (net of unearned income)	10,760,978	10,154,887
Less: Allowance for loan losses	108,078	100,954
Loans held for investment, net	16,061,650	14,156,058
Premises and equipment, net	16,037	17,368
Accrued interest receivable and other assets	355,163	333,699
Goodwill and intangible assets, net	20,412	20,588
Total assets	17,325,458	15,899,946
Non-interest-bearing
Non-interest-bearing	6,050,817	5,011,619
Interest-bearing	7,816,310	7,348,972
Interest-bearing in foreign branches	255,179	312,709
Total deposits	14,122,306	12,673,300
Accrued interest payable	2,545	4,747
Other liabilities	157,785	145,622
Federal funds purchased and repurchase agreements	125,458	92,676
Other borrowings	1,000,000	1,100,005
Subordinated notes	286,000	286,000
Trust preferred subordinated debentures	113,406	113,406
Total liabilities	15,807,500	14,415,756
Stockholders’ equity:
Preferred stock, $.01 par value, $1,000 liquidation value; Authorized shares - 10,000,000; Issued shares – 6,000,000 shares issued at March 31, 2015 and December 31, 2014, respectively	150,000	150,000
Common stock, $.01 par value; Authorized shares - 100,000,000; Issued shares – 45,772,662 and 45,735,424 at March 31, 2015 and December 31, 2014, respectively	457	457
Additional paid-in capital	710,943	709,738
Retained earnings	655,326	622,714
Treasury stock (shares at cost: 417 at March 31, 2015 and December 31, 2014)	(8)	(8)
Accumulated other comprehensive income, net of taxes	1,240	1,289
Total stockholders’ equity	1,517,958	1,484,190
Total liabilities and stockholders’ equity	$ 17,325,458	$ 15,899,946

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EARNINGS PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Numerator:
Net income	$ 35,050		$ 28,265
Preferred stock dividends	(2,438)		(2,438)
Net income available to common stockholders	$ 32,612		$ 25,827
Denominator:
Denominator for basic earnings per share— weighted average shares	45,758,655		42,298,355
Effect of employee stock-based awards	210,736	[1]	381,597	[1]
Effect of warrants to purchase common stock	398,479		540,009
Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions	46,367,870		43,219,961
Basic earnings per common share (usd per share)	$ 0.71		$ 0.61
Diluted earnings per common share (usd per share)	$ 0.70		$ 0.60
Stock options, SARs and RSUs excluded from computation of diluted EPS	168,300		23,000

[1] Stock options, SARs and RSUs outstanding of 168,300 at March 31, 2015 and 23,000 at March 31, 2014 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

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OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO (Tables)

3 Months Ended

Mar. 31, 2015

Real Estate Owned, Disclosure of Detailed Components [Abstract]

Schedule of the activity related to OREO

The table below presents a summary of the activity related to OREO (in thousands):

	Three months ended March 31,
	2015			2014
Beginning balance	$	568		$	5,110
Additions	1,092			851
Sales	(1,055		)	(3,541		)
Valuation allowance for OREO	—			—
Direct write-downs	—			—
Ending balance	$	605		$	2,420

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REGULATORY MATTERS (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
CET1	7.18%	7.89%
Tier 1 capital	8.57%	9.46%
Total capital	10.71%	11.83%
Leverage	9.53%	10.76%
Mortgage finance	$ 5,408,750,000	$ 4,102,125,000
Mortgage finance, average balance	$ 3,700,000,000

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 6) (USD $)	Mar. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	$ 29,224,000
60-89 days past due	2,634,000
Greater Than 90 Days and Accruing	2,971,000	[1]
Total past due	34,829,000
Non-accrual	68,307,000
Current	16,122,822,000
Total	16,225,958,000
Premium finance loans past due 90 days and still accruing	2,800,000
Commercial | Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	17,210,000
60-89 days past due	2,591,000
Greater Than 90 Days and Accruing	2,846,000	[1]
Total past due	22,647,000
Non-accrual	57,251,000
Current	4,970,584,000
Total	5,050,482,000
Commercial | Energy
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	0
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	0
Non-accrual	1,902,000
Current	1,136,574,000
Total	1,138,476,000
Mortgage finance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	0
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	0
Non-accrual	0
Current	5,408,750,000
Total	5,408,750,000
Construction | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	2,845,000
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	2,845,000
Non-accrual	0
Current	1,540,220,000
Total	1,543,065,000
Construction | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	0
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	0
Non-accrual	0
Current	16,480,000
Total	16,480,000
Real estate | Market risk
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	5,222,000
60-89 days past due	0
Greater Than 90 Days and Accruing	125,000	[1]
Total past due	5,347,000
Non-accrual	3,827,000
Current	2,282,609,000
Total	2,291,783,000
Real estate | Secured by 1-4 family
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	407,000
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	407,000
Non-accrual	587,000
Current	91,696,000
Total	92,690,000
Real estate | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	0
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	0
Non-accrual	4,568,000
Current	568,745,000
Total	573,313,000
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	422,000
60-89 days past due	43,000
Greater Than 90 Days and Accruing	0	[1]
Total past due	465,000
Non-accrual	0
Current	17,403,000
Total	17,868,000
Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due	3,118,000
60-89 days past due	0
Greater Than 90 Days and Accruing	0	[1]
Total past due	3,118,000
Non-accrual	172,000
Current	89,761,000
Total	$ 93,051,000

[1] Loans past due 90 days and still accruing includes premium finance loans of $2.8 million. These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Reserve for loan losses:
Beginning balance	$ 100,954	$ 87,604
Provision for loan losses	10,245	4,710
Charge-offs	3,510	2,447
Recoveries	389	367
Net charge-offs (recoveries)	3,121	2,080
Period end amount allocated to:
Loans individually evaluated for impairment	11,232	7,029
Loans collectively evaluated for impairment	96,846	83,205
Ending balance	108,078	90,234
Commercial
Reserve for loan losses:
Beginning balance	70,654	39,868
Provision for loan losses	23,375	6,245
Charge-offs	3,102	2,336
Recoveries	286	210
Net charge-offs (recoveries)	2,816	2,126
Period end amount allocated to:
Loans individually evaluated for impairment	10,958	6,029
Loans collectively evaluated for impairment	80,255	37,958
Ending balance	91,213	43,987
Mortgage finance loans
Reserve for loan losses:
Beginning balance	0	0
Provision for loan losses	0	0
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Period end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	0
Ending balance	0	0
Construction
Reserve for loan losses:
Beginning balance	7,935	14,553
Provision for loan losses	(3,472)	583
Charge-offs	0	0
Recoveries	83	0
Net charge-offs (recoveries)	(83)	0
Period end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	4,546	15,136
Ending balance	4,546	15,136
Real Estate
Reserve for loan losses:
Beginning balance	15,582	24,210
Provision for loan losses	(5,601)	(495)
Charge-offs	346	0
Recoveries	8	8
Net charge-offs (recoveries)	338	(8)
Period end amount allocated to:
Loans individually evaluated for impairment	248	993
Loans collectively evaluated for impairment	9,395	22,730
Ending balance	9,643	23,723
Consumer
Reserve for loan losses:
Beginning balance	240	149
Provision for loan losses	149	56
Charge-offs	62	61
Recoveries	4	25
Net charge-offs (recoveries)	58	36
Period end amount allocated to:
Loans individually evaluated for impairment	0	1
Loans collectively evaluated for impairment	331	168
Ending balance	331	169
Leases
Reserve for loan losses:
Beginning balance	1,141	3,105
Provision for loan losses	(138)	(575)
Charge-offs	0	50
Recoveries	8	124
Net charge-offs (recoveries)	(8)	(74)
Period end amount allocated to:
Loans individually evaluated for impairment	26	6
Loans collectively evaluated for impairment	985	2,598
Ending balance	1,011	2,604
Unallocated
Reserve for loan losses:
Beginning balance	5,402	5,719
Provision for loan losses	(4,068)	(1,104)
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Period end amount allocated to:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	1,334	4,615
Ending balance	$ 1,334	$ 4,615

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	$ 73,315	$ 49,280	$ 50,185
Loans collectively evaluated for impairment	16,152,643	14,264,790	11,620,409
Gross loans held for investment	16,225,958	14,314,070	11,670,594
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	61,233	35,165	29,023
Loans collectively evaluated for impairment	6,127,725	5,834,054	5,176,492
Gross loans held for investment	6,188,958	5,869,219	5,205,515
Mortgage finance loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	5,408,750	4,102,125	2,688,044
Gross loans held for investment	5,408,750	4,102,125	2,688,044
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	1,559,545	1,416,405	1,437,609
Gross loans held for investment	1,559,545	1,416,405	1,437,609
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	11,910	13,880	21,112
Loans collectively evaluated for impairment	2,945,876	2,793,247	2,208,237
Gross loans held for investment	2,957,786	2,807,127	2,229,349
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	0	62	8
Loans collectively evaluated for impairment	17,868	19,637	14,807
Gross loans held for investment	17,868	19,699	14,815
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans individually evaluated for impairment	172	173	42
Loans collectively evaluated for impairment	92,879	99,322	95,220
Gross loans held for investment	$ 93,051	$ 99,495	$ 95,262

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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK

3 Months Ended

Mar. 31, 2015

Risks and Uncertainties [Abstract]

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK

The Bank is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit which involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets. The Bank’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, if deemed necessary, is based on management’s credit evaluation of the borrower.

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer’s credit-worthiness on a case-by-case basis.

Standby letters of credit are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.

The table below summarizes our off-balance sheet financial instruments whose contract amounts represented credit risk (in thousands):

	March 31, 2015		December 31, 2014
Commitments to extend credit	$	5,178,514	$	5,324,460
Standby letters of credit	173,198		177,808

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SECURITIES (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Available-for-sale Securities [Abstract]
Available-for-sale securities, net unrealized gains	$ 1,900,000		$ 2,000,000
Available for sale securities, net unrealized gain as percent of outstanding balances	5.34%		4.99%
Summary of Available-for-Sale Securities
Amortized Cost	35,742,000		39,736,000
Gross Unrealized Gains	2,037,000		2,134,000
Gross Unrealized Losses	(130,000)		(151,000)
Estimated Fair Value	37,649,000		41,719,000
Residential mortgage-backed securities
Summary of Available-for-Sale Securities
Amortized Cost	26,912,000	[1]	28,957,000	[1]
Gross Unrealized Gains	2,006,000		2,108,000
Gross Unrealized Losses	0		0
Estimated Fair Value	28,918,000	[1]	31,065,000	[1]
Municipals
Summary of Available-for-Sale Securities
Amortized Cost	1,308,000	[2]	3,257,000	[2]
Gross Unrealized Gains	5,000		10,000
Gross Unrealized Losses	0		0
Estimated Fair Value	1,313,000	[2]	3,267,000	[2]
Equity securities
Summary of Available-for-Sale Securities
Amortized Cost	7,522,000	[3],[4]	7,522,000	[3],[4]
Gross Unrealized Gains	26,000	[3]	16,000	[3]
Gross Unrealized Losses	(130,000)	[3]	(151,000)	[3]
Estimated Fair Value	$ 7,418,000	[3],[4]	$ 7,387,000	[3],[4]

[1] Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

[2] Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

[3] Equity securities consist of Community Reinvestment Act funds.

[4] These equity securities do not have a stated maturity.

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OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance	$ 568	[1],[2]	$ 5,110
Additions	1,092		851
Sales	(1,055)		(3,541)
Valuation allowance for OREO	0		0
Direct write-downs	0		0
Ending balance	$ 605	[1],[2]	$ 2,420

[1] Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

[2] OREO is transferred from loans to OREO at fair value less selling costs.

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FAIR VALUE DISCLOSURES

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES

ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), defines fair value, establishes a framework for measuring fair value under GAAP and requires enhanced disclosures about fair value measurements. Fair value is defined under ASC 820 as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal market for the asset or liability in an orderly transaction between market participants on the measurement date.

We determine the fair market values of our assets and liabilities measured at fair value on a recurring and nonrecurring basis using the fair value hierarchy as prescribed in ASC 820. The standard describes three levels of inputs that may be used to measure fair value as provided below.

Level 1 Quoted prices in active markets for identical assets or liabilities.

Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include U.S. government and agency mortgage-backed debt securities, municipal bonds, and Community Reinvestment Act funds. This category includes derivative assets and liabilities where values are obtained from independent pricing services.

Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant management judgment or estimation. This category includes impaired loans and OREO where collateral values have been based on third party appraisals; however, due to current economic conditions, comparative sales data typically used in appraisals may be unavailable or more subjective due to lack of market activity.

Assets and liabilities measured at fair value at March 31, 2015 and December 31, 2014 are as follows (in thousands):

	Fair Value Measurements Using
March 31, 2015	Level 1		Level 2		Level 3
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	28,918	$	—
Municipals	—		1,313		—
Equity securities(2)	—		7,418		—
Loans(3) (5)	—		—		23,210
OREO(4) (5)	—		—		605
Derivative assets(6)	—		43,746		—
Derivative liabilities(6)	—		43,746		—
December 31, 2014
Available for sale securities:(1)
Residential mortgage-backed securities	$	—	$	31,065	$	—
Municipals	—		3,267		—
Equity securities(2)	—		7,387		—
Loans(3) (5)	—		—		23,536
OREO(4) (5)	—		—		568
Derivative assets(6)	—		31,176		—
Derivative liabilities(6)	—		31,176		—

(1) Securities are measured at fair value on a recurring basis, generally monthly.

(2) Equity securities consist of Community Reinvestment Act funds.

(3) Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

(4) OREO is transferred from loans to OREO at fair value less selling costs.

(5) Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

(6) Derivative assets and liabilities are measured at fair value on a recurring basis, generally quarterly.

Level 3 Valuations

Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Currently, we measure fair value for certain loans and OREO on a nonrecurring basis as described below.

Loans

During three months ended March 31, 2015 and the year ended December 31, 2014, certain impaired loans were re-evaluated and reported at fair value through a specific allocation of the allowance for loan losses based upon the fair value of the underlying collateral. The $23.2 million total above includes impaired loans at March 31, 2015 with a carrying value of $26.2 million that were reduced by specific allowance allocations totaling $3.0 million for a total reported fair value of $23.2 million based on collateral valuations utilizing Level 3 valuation inputs. The $23.5 million total above includes impaired loans at December 31, 2014 with a carrying value of $29.2 million that were reduced by specific valuation allowance allocations totaling $5.7 million for a total reported fair value of $23.5 million based on collateral valuations utilizing Level 3 valuation inputs. Fair values were based on third party appraisals.

OREO

Certain foreclosed assets, upon initial recognition, are valued based on third party appraisals less estimated selling costs. At March 31, 2015 and December 31, 2014, OREO had a carrying value of $605,000 and $568,000, respectively, with no specific valuation allowance. The fair value of OREO was computed based on third party appraisals, which are Level 3 valuation inputs.

Fair Value of Financial Instruments

Generally accepted accounting principles require disclosure of fair value information about financial instruments, whether or not recognized on the balance sheet, for which it is practical to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. This disclosure does not and is not intended to represent the fair value of the Company.

A summary of the carrying amounts and estimated fair values of financial instruments is as follows (in thousands):

	March 31, 2015				December 31, 2014
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	834,547	$	834,547	$	1,330,514	$	1,330,514
Securities, available-for-sale	37,649		37,649		41,719		41,719
Loans held for investment, net	16,061,650		16,067,528		14,156,058		14,161,484
Derivative assets	43,746		43,746		31,176		31,176
Deposits	14,122,306		14,122,653		12,673,300		12,673,607
Federal funds purchased	88,384		88,384		66,971		66,971
Customer repurchase agreements	37,074		37,074		25,705		25,705
Other borrowings	1,000,000		1,000,000		1,100,005		1,100,005
Subordinated notes	286,000		292,521		286,000		289,947
Trust preferred subordinated debentures	113,406		113,406		113,406		113,406
Derivative liabilities	43,746		43,746		31,176		31,176

The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments:

Cash and cash equivalents

The carrying amounts reported in the consolidated balance sheet for cash and cash equivalents approximate their fair value, which is characterized as a Level 1 asset in the fair value hierarchy

Securities

The fair value of investment securities is based on prices obtained from independent pricing services which are based on quoted market prices for the same or similar securities, which is characterized as a Level 2 asset in the fair value hierarchy. We have obtained documentation from the primary pricing service we use about their processes and controls over pricing. In addition, on a quarterly basis we independently verify the prices that we receive from the service provider using two additional independent pricing sources. Any significant differences are investigated and resolved.

Loans, net

Loans are characterized as Level 3 assets in the fair value hierarchy. For variable-rate loans that reprice frequently with no significant change in credit risk, fair values are generally based on carrying values. The fair value for all other loans is estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.

Derivatives

The estimated fair value of interest rate swaps and caps are obtained from independent pricing services based on quoted market prices for the same or similar derivative contracts and are characterized as a Level 2 asset in the fair value hierarchy. On a quarterly basis, we independently verify the fair value using an additional independent pricing source.

Deposits

Deposits are characterized as Level 3 liabilities in the fair value hierarchy. The carrying amounts for variable-rate money market accounts approximate their fair value. Fixed-term certificates of deposit fair values are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities.

Federal funds purchased, customer repurchase agreements, other borrowings, subordinated notes and trust preferred subordinated debentures

The carrying value reported in the consolidated balance sheet for Federal funds purchased, customer repurchase agreements and other short-term, floating rate borrowings approximates their fair value, which are characterized as Level 2 assets in the fair value hierarchy. The fair value of any fixed rate short-term borrowings and trust preferred subordinated debentures is estimated using a discounted cash flow calculation that applies interest rates currently being offered on similar borrowings, which are characterized as Level 3 liabilities in the fair value hierarchy. The subordinated notes are publicly traded and are valued based on market prices, which are characterized as Level 2 liabilities in the fair value hierarchy.

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OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO

3 Months Ended

Mar. 31, 2015

Real Estate Owned, Disclosure of Detailed Components [Abstract]

OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO

OREO AND VALUATION ALLOWANCE FOR LOSSES ON OREO

The table below presents a summary of the activity related to OREO (in thousands):

	Three months ended March 31,
	2015			2014
Beginning balance	$	568		$	5,110
Additions	1,092			851
Sales	(1,055		)	(3,541		)
Valuation allowance for OREO	—			—
Direct write-downs	—			—
Ending balance	$	605		$	2,420

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating activities
Income from continuing operations	$ 35,050	$ 28,265
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	11,000	5,000
Depreciation and amortization	4,060	3,012
Amortization and accretion on securities	0	1
Bank owned life insurance (BOLI) income	(484)	(509)
Stock-based compensation expense	(2,357)	(4,655)
Excess tax expense from stock-based compensation arrangements	(305)	(955)
Gain on sale of assets	0	136
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(24,849)	3,681
Accrued interest payable and other liabilities	8,885	(4,763)
Net cash provided by operating activities	35,714	38,523
Investing activities
Maturities and calls of available-for-sale securities	1,950	7,440
Principal payments received on available-for-sale securities	2,044	2,651
Originations of mortgage finance loans	(21,276,920)	(9,687,691)
Proceeds from pay-offs of mortgage finance loans	19,970,295	9,783,912
Net increase in loans held for investment, excluding mortgage finance loans	(609,967)	(444,070)
Purchase (disposal) of premises and equipment, net	251	(1,161)
Proceeds from sale of foreclosed assets	1,065	3,405
Net cash used in investing activities	(1,911,282)	(335,514)
Financing activities
Net increase in deposits	1,449,006	471,749
Net expense from issuance of stock related to stock-based awards	(49)	(706)
Net proceeds from issuance of common stock	0	106,548
Preferred dividends paid	(2,438)	(2,438)
Net increase in other borrowings	(100,005)	(342,527)
Excess tax benefits from stock-based compensation arrangements	305	955
Net increase (decrease) in Federal funds purchased and repurchase agreements	32,782	(5,077)
Net proceeds from issuance of subordinated notes	0	172,375
Net cash provided by financing activities	1,379,601	400,879
Net increase (decrease) in cash and cash equivalents	(495,967)	103,888
Cash and cash equivalents at beginning of period	1,330,514	153,911
Cash and cash equivalents at end of period	834,547	257,799
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	13,101	6,741
Cash paid during the period for income taxes	891	882
Transfers from loans/leases to OREO and other repossessed assets	$ 1,092	$ 851

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FAIR VALUE DISCLOSURES (Financial Instruments) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
OREO	$ 605,000	[1],[2]	$ 568,000	[1],[2]	$ 2,420,000	$ 5,110,000
Securities, available-for-sale	37,649,000		41,719,000
Derivative assets	43,746,000		31,176,000
Derivative liabilities	43,746,000		31,176,000
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	834,547,000		1,330,514,000
Securities, available-for-sale	37,649,000		41,719,000
Loans held for investment, net	16,061,650,000		14,156,058,000
Derivative assets	43,746,000		31,176,000
Deposits	14,122,306,000		12,673,300,000
Federal funds purchased	88,384,000		66,971,000
Customer repurchase agreements	37,074,000		25,705,000
Other borrowings	1,000,000,000		1,100,005,000
Subordinated notes	286,000,000		286,000,000
Trust preferred subordinated debentures	113,406,000		113,406,000
Derivative liabilities	43,746,000		31,176,000
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	834,547,000		1,330,514,000
Securities, available-for-sale	37,649,000		41,719,000
Loans held for investment, net	16,067,528,000		14,161,484,000
Derivative assets	43,746,000		31,176,000
Deposits	14,122,653,000		12,673,607,000
Federal funds purchased	88,384,000		66,971,000
Customer repurchase agreements	37,074,000		25,705,000
Other borrowings	1,000,000,000		1,100,005,000
Subordinated notes	292,521,000		289,947,000
Trust preferred subordinated debentures	113,406,000		113,406,000
Derivative liabilities	43,746,000		31,176,000
Level 3 | Fair value measurements, nonrecurring basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of impaired loans	26,200,000		29,200,000
Allowance allocation of impaired loans	3,000,000		5,700,000
OREO	605,000	[1],[2]	568,000	[1],[2]
Loans held for investment, net	$ 23,210,000	[1],[3]	$ 23,536,000	[1],[3]

[1] Fair value of loans and OREO is measured on a nonrecurring basis, generally annually or more often as warranted by market and economic conditions.

[2] OREO is transferred from loans to OREO at fair value less selling costs.

[3] Includes impaired loans that have been measured for impairment at the fair value of the loan’s collateral.

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Loans and Leases Receivable, Net Reported Amount
Commercial	$ 6,188,958,000	$ 5,869,219,000
Mortgage finance	5,408,750,000	4,102,125,000
Construction	1,559,545,000	1,416,405,000
Real estate	2,957,786,000	2,807,127,000
Consumer	17,868,000	19,699,000
Leases	93,051,000	99,495,000
Gross loans held for investment	16,225,958,000	14,314,070,000	11,670,594,000
Deferred income (net of direct origination costs)	(56,230,000)	(57,058,000)
Allowance for loan losses	(108,078,000)	(100,954,000)	(90,234,000)	(87,604,000)
Loans held for investment, net	16,061,650,000	14,156,058,000
Participating mortgage finance loans	$ 429,800,000	$ 358,300,000

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Nature of Business

Organization and Nature of Business

Texas Capital Bancshares, Inc. (the “Company”), a Delaware corporation, was incorporated in November 1996 and commenced banking operations in December 1998. The consolidated financial statements of the Company include the accounts of Texas Capital Bancshares, Inc. and its wholly owned subsidiary, Texas Capital Bank, National Association (the “Bank”). We serve the needs of commercial businesses and successful professionals and entrepreneurs located in Texas as well as operate several lines of business serving a regional or national clientele of commercial borrowers. We are primarily a secured lender, with our greatest concentration of loans in Texas.

Basis of Presentation

Basis of Presentation

Our accounting and reporting policies conform to accounting principles generally accepted in the United States (“GAAP”) and to generally accepted practices within the banking industry. Certain prior period balances have been reclassified to conform to the current period presentation.

The consolidated interim financial statements have been prepared without audit. Certain information and footnote disclosures presented in accordance with GAAP have been condensed or omitted. In the opinion of management, the interim financial statements include all normal and recurring adjustments and the disclosures made are adequate to make interim financial information not misleading. The consolidated financial statements have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our consolidated financial statements, and notes thereto, for the year ended December 31, 2014, included in our Annual Report on Form 10-K filed with the SEC on February 19, 2015 (the “2014 Form 10-K”). Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. The allowance for loan losses, the fair value of stock-based compensation awards, the fair values of financial instruments and the status of contingencies are particularly susceptible to significant change in the near term.

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STOCK-BASED COMPENSATION

3 Months Ended

Mar. 31, 2015

Compensation Related Costs [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION

The fair value of our stock option and stock appreciation right (“SAR”) grants are estimated at the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our employee stock options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, in management’s opinion, the existing models do not necessarily provide the best single measure of the fair value of our employee stock options.

Stock-based compensation consists of SARs and RSUs granted from 2009 through March 31, 2015.

	Three months ended March 31,
(in thousands)	2015		2014
Stock- based compensation expense recognized:
SARs	$	104	$	143
RSUs	887		1,119
Total compensation expense recognized	$	991	$	1,262

	March 31, 2015
(in thousands)	Options		SARs and RSUs
Unrecognized compensation expense related to unvested awards	$	—	$	11,804
Weighted average period over which expense is expected to be recognized, in years	N/A		3.5

In connection with the 2010 Long-term Incentive Plan, the Company has issued cash-based performance units. A summary of the compensation cost for these units is as follows (in thousands):

	Three months ended March 31,
	2015		2014
Cash-based performance units	$	1,366	$	3,393

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)

3 Months Ended

Mar. 31, 2015

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

Schedule of loans held for investments

At March 31, 2015 and December 31, 2014, loans were as follows (in thousands):

	March 31, 2015			December 31, 2014
Commercial	$	6,188,958		$	5,869,219
Mortgage finance	5,408,750			4,102,125
Construction	1,559,545			1,416,405
Real estate	2,957,786			2,807,127
Consumer	17,868			19,699
Leases	93,051			99,495
Gross loans held for investment	16,225,958			14,314,070
Deferred income (net of direct origination costs)	(56,230		)	(57,058		)
Allowance for loan losses	(108,078		)	(100,954		)
Total	$	16,061,650		$	14,156,058

Schedule of the credit risk profile of loan portfolio by internally assigned grades and non-accrual status

The following tables summarize the credit risk profile of our loan portfolio by internally assigned grades and non-accrual status as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,933,412	$	5,408,750	$	1,557,507	$	2,939,032	$	17,640	$	85,253	$	15,941,594
Special mention	139,110		—		—		7,153		9		4,065		150,337
Substandard-accruing	57,283		—		2,038		2,619		219		3,561		65,720
Non-accrual	59,153		—		—		8,982		—		172		68,307
Total loans held for investment	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Grade:
Pass	$	5,738,474	$	4,102,125	$	1,414,671	$	2,785,804	$	19,579	$	91,044	$	14,151,697
Special mention	53,839		—		1,734		8,723		11		4,363		68,670
Substandard-accruing	43,784		—		—		2,653		47		3,915		50,399
Non-accrual	33,122		—		—		9,947		62		173		43,304
Total loans held for investment	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070

Schedule of activity in the reserve for loan losses by portfolio segment

The following table details activity in the reserve for loan losses by portfolio segment for the three months ended March 31, 2015 and March 31, 2014. Allocation of a portion of the reserve to one category of loans does not preclude its availability to absorb losses in other categories.

March 31, 2015
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	70,654	$	—	$	7,935		$	15,582		$	240	$	1,141		$	5,402		$	100,954
Provision for loan losses	23,375		—		(3,472		)	(5,601		)	149		(138		)	(4,068		)	10,245
Charge-offs	3,102		—		—			346			62		—			—			3,510
Recoveries	286		—		83			8			4		8			—			389
Net charge-offs (recoveries)	2,816		—		(83		)	338			58		(8		)	—			3,121
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
Period end amount allocated to:
Loans individually evaluated for impairment	$	10,958	$	—	$	—		$	248		$	—	$	26		$	—		$	11,232
Loans collectively evaluated for impairment	80,255		—		4,546			9,395			331		985			1,334			96,846
Ending balance	$	91,213	$	—	$	4,546		$	9,643		$	331	$	1,011		$	1,334		$	108,078
March 31, 2014
(in thousands)	Commercial		Mortgage Finance		Construction			Real Estate			Consumer		Leases			Unallocated			Total
Beginning balance	$	39,868	$	—	$	14,553		$	24,210		$	149	$	3,105		$	5,719		$	87,604
Provision for loan losses	6,245		—		583			(495		)	56		(575		)	(1,104		)	4,710
Charge-offs	2,336		—		—			—			61		50			—			2,447
Recoveries	210		—		—			8			25		124			—			367
Net charge-offs (recoveries)	2,126		—		—			(8		)	36		(74		)	—			2,080
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234
Period end amount allocated to:
Loans individually evaluated for impairment	$	6,029	$	—	$	—		$	993		$	1	$	6		$	—		$	7,029
Loans collectively evaluated for impairment	37,958		—		15,136			22,730			168		2,598			4,615			83,205
Ending balance	$	43,987	$	—	$	15,136		$	23,723		$	169	$	2,604		$	4,615		$	90,234

Schedule of recorded investment in loans related to each balance in the allowance for loan losses

Our recorded investment in loans as of March 31, 2015, December 31, 2014 and March 31, 2014 related to each balance in the allowance for loan losses by portfolio segment and disaggregated on the basis of our impairment methodology was as follows (in thousands):

March 31, 2015
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	61,233	$	—	$	—	$	11,910	$	—	$	172	$	73,315
Loans collectively evaluated for impairment	6,127,725		5,408,750		1,559,545		2,945,876		17,868		92,879		16,152,643
Total	$	6,188,958	$	5,408,750	$	1,559,545	$	2,957,786	$	17,868	$	93,051	$	16,225,958
December 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	35,165	$	—	$	—	$	13,880	$	62	$	173	$	49,280
Loans collectively evaluated for impairment	5,834,054		4,102,125		1,416,405		2,793,247		19,637		99,322		14,264,790
Total	$	5,869,219	$	4,102,125	$	1,416,405	$	2,807,127	$	19,699	$	99,495	$	14,314,070
March 31, 2014
	Commercial		Mortgage Finance		Construction		Real Estate		Consumer		Leases		Total
Loans individually evaluated for impairment	$	29,023	$	—	$	—	$	21,112	$	8	$	42	$	50,185
Loans collectively evaluated for impairment	5,176,492		2,688,044		1,437,609		2,208,237		14,807		95,220		11,620,409
Total	$	5,205,515	$	2,688,044	$	1,437,609	$	2,229,349	$	14,815	$	95,262	$	11,670,594

Schedule of impaired loans, by portfolio class

A loan held for investment is considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. In accordance with ASC 310 Receivables ("ASC 310"), we have also included all restructured loans in our impaired loan totals. The following tables detail our impaired loans, by portfolio class, as of March 31, 2015 and December 31, 2014 (in thousands):

March 31, 2015
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	31,214	$	35,375	$	—	$	16,810	$	—
Energy	1,266		1,266		—		422		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	3,688		3,688		—		3,719		—
Commercial	4,132		4,132		—		3,725		—
Secured by 1-4 family	—		—		—		—		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	40,300	$	44,461	$	—	$	24,676	$	10
With an allowance recorded:
Commercial
Business loans	$	28,117	$	28,117	$	10,860	$	25,741	$	—
Energy	636		636		98		881		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	1,944		1,944		46		3,451		—
Commercial	436		436		65		496		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans with an allowance recorded	$	33,015	$	33,015	$	11,232	$	32,616	$	—
Combined:
Commercial
Business loans	$	59,331	$	63,492	$	10,860	$	42,551	$	—
Energy	1,902		1,902		98		1,303		10
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	5,632		5,632		46		7,170		—
Commercial	4,568		4,568		65		4,221		—
Secured by 1-4 family	1,710		1,710		137		1,833		—
Consumer	—		—		—		41		—
Leases	172		172		26		173		—
Total impaired loans	$	73,315	$	77,476	$	11,232	$	57,292	$	10

December 31, 2014
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized
With no related allowance recorded:
Commercial
Business loans	$	9,608	$	11,857	$	—	$	7,334	$	—
Energy	—		—		—		375		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	3,735		3,735		—		7,970		—
Commercial	3,521		3,521		—		2,795		—
Secured by 1-4 family	—		—		—		1,210		—
Consumer	—		—		—		—		—
Leases	—		—		—		—		—
Total impaired loans with no allowance recorded	$	16,864	$	19,113	$	—	$	19,802	$	25
With an allowance recorded:
Commercial
Business loans	$	24,553	$	25,553	$	7,433	$	17,705	$	—
Energy	1,004		1,004		272		991		—
Construction
Market risk	—		—		—		—		—
Real estate
Market risk	4,203		4,203		317		5,064		—
Commercial	526		526		79		705		—
Secured by 1-4 family	1,895		1,895		240		2,119		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans with an allowance recorded	$	32,416	$	33,416	$	8,376	$	26,641	$	—
Combined:
Commercial
Business loans	$	34,161	$	37,410	$	7,433	$	25,039	$	—
Energy	1,004		1,004		272		1,366		25
Construction
Market risk	—		—		—		118		—
Real estate
Market risk	7,938		7,938		317		13,034		—
Commercial	4,047		4,047		79		3,500		—
Secured by 1-4 family	1,895		1,895		240		3,329		—
Consumer	62		62		9		16		—
Leases	173		173		26		41		—
Total impaired loans	$	49,280	$	52,529	$	8,376	$	46,443	$	25

Schedule of an age analysis of accruing past due loans

The table below provides an age analysis of our past due loans that are still accruing and non-accrual loans, by portfolio class, as of March 31, 2015 (in thousands):

	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days and Accruing(1)		Total Past Due		Non-accrual		Current		Total
Commercial
Business loans	$	17,210	$	2,591	$	2,846	$	22,647	$	57,251	$	4,970,584	$	5,050,482
Energy	—		—		—		—		1,902		1,136,574		1,138,476
Mortgage finance loans	—		—		—		—		—		5,408,750		5,408,750
Construction
Market risk	2,845		—		—		2,845		—		1,540,220		1,543,065
Secured by 1-4 family	—		—		—		—		—		16,480		16,480
Real estate
Market risk	5,222		—		125		5,347		3,827		2,282,609		2,291,783
Commercial	—		—		—		—		4,568		568,745		573,313
Secured by 1-4 family	407		—		—		407		587		91,696		92,690
Consumer	422		43		—		465		—		17,403		17,868
Leases	3,118		—		—		3,118		172		89,761		93,051
Total loans held for investment	$	29,224	$	2,634	$	2,971	$	34,829	$	68,307	$	16,122,822	$	16,225,958

(1) Loans past due 90 days and still accruing includes premium finance loans of $2.8 million. These loans are generally secured by obligations of insurance carriers to refund premiums on canceled insurance policies. The refund of premiums from the insurance carriers can take 180 days or longer from the cancellation date.

Schedule of loans that have been restructured

The following table provides information on how restructured loans were modified during the three months ended March 31, 2015 and 2014 (in thousands):

	Three months ended March 31,
	2015		2014
Extended maturity	$	—	$	1,441
Combination of maturity extension and payment schedule adjustment	1,369		—
Total	$	1,369	$	1,441

The following tables summarize, for the three months ended March 31, 2015 and 2014, loans that were restructured during 2015 and 2014 (in thousands):

March 31, 2015
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Commercial business loans	2	$	1,369	$	1,369
Total new restructured loans in 2015	2	$	1,369	$	1,369
March 31, 2014
	Number of Restructured Loans	Pre-Restructuring Outstanding Recorded Investment		Post-Restructuring Outstanding Recorded Investment
Real estate—commercial	1	$	1,441	$	1,441
Total new restructured loans in 2014	1	$	1,441	$	1,441

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EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per share

The following table presents the computation of basic and diluted earnings per share (in thousands except per share data):

	Three months ended   March 31,
	2015		2014
Numerator:
Net income	$	35,050	$	28,265
Preferred stock dividends	2,438		2,438
Net income available to common stockholders	$	32,612	25,827
Denominator:
Denominator for basic earnings per share— weighted average shares	45,758,655		42,298,355
Effect of employee stock-based awards(1)	210,736		381,597
Effect of warrants to purchase common stock	398,479		540,009
Denominator for dilutive earnings per share—adjusted weighted average shares and assumed conversions	46,367,870		43,219,961
Basic earnings per common share	$	0.71	$	0.61
Diluted earnings per common share	$	0.70	$	0.60

(1) Stock options, SARs and RSUs outstanding of 168,300 at March 31, 2015 and 23,000 at March 31, 2014 have not been included in diluted earnings per share because to do so would have been anti-dilutive for the periods presented.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 21, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	TEXAS CAPITAL BANCSHARES INC/TX
Entity Central Index Key	0001077428
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		45,774,646

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SECURITIES (Tables)

3 Months Ended

Mar. 31, 2015

Available-for-sale Securities [Abstract]

Schedule of summary of securities

The following is a summary of securities (in thousands):

	March 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	26,912	$	2,006	$	—		$	28,918
Municipals	1,308		5		—			1,313
Equity securities(1)	7,522		26		(130		)	7,418
	$	35,742	$	2,037	$	(130	)	$	37,649
	December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Available-for-Sale Securities:
Residential mortgage-backed securities	$	28,957	$	2,108	$	—		$	31,065
Municipals	3,257		10		—			3,267
Equity securities(1)	7,522		16		(151		)	7,387
	$	39,736	$	2,134	$	(151	)	$	41,719

(1) Equity securities consist of Community Reinvestment Act funds.

Schedule of amortized cost and estimated fair value of securities

The amortized cost and estimated fair value of securities are presented below by contractual maturity (in thousands, except percentage data):

	March 31, 2015
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	—		$	7,967		$	5,250		$	13,695		$	26,912
Estimated fair value	—			8,394			5,904			14,620			28,918
Weighted average yield(3)	—			4.79		%	5.54		%	2.36		%	3.73		%
Municipals:(2)
Amortized cost	745			563			—			—			1,308
Estimated fair value	747			566			—			—			1,313
Weighted average yield(3)	5.51		%	5.69		%	—			—			5.59		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,418			—			—			—			7,418
Total available-for-sale securities:
Amortized cost													$	35,742
Estimated fair value													$	37,649

	December 31, 2014
	Less Than One Year			After One Through Five Years			After Five Through Ten Years			After Ten Years			Total
Available-for-sale:
Residential mortgage-backed securities:(1)
Amortized cost	$	1		$	9,151		$	5,661		$	14,144		$	28,957
Estimated fair value	1			9,662			6,333			15,069			31,065
Weighted average yield(3)	6.50		%	4.79		%	5.54		%	2.36		%	3.75		%
Municipals:(2)
Amortized cost	1,669			1,588			—			—			3,257
Estimated fair value	1,674			1,593			—			—			3,267
Weighted average yield(3)	5.78		%	5.79		%	—			—			5.79		%
Equity securities:(4)
Amortized cost	7,522			—			—			—			7,522
Estimated fair value	7,387			—			—			—			7,387
Total available-for-sale securities:
Amortized cost													$	39,736
Estimated fair value													$	41,719

(1) Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties.

(2) Yields have been adjusted to a tax equivalent basis assuming a 35% federal tax rate.

(3) Yields are calculated based on amortized cost.

(4) These equity securities do not have a stated maturity.

Schedule of investment securities that have been in a continuous unrealized loss position for less or more than 12 months

The following table discloses, as of March 31, 2015 and December 31, 2014, our investment securities that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for 12 or more months (in thousands):

March 31, 2015	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,370	$	(130	)	$	6,370	$	(130	)
December 31, 2014	Less Than 12 Months				12 Months or Longer					Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Equity securities	$	—	$	—	$	6,349	$	(151	)	$	6,349	$	(151	)